to let blood

from The Collaborative International Dictionary of English v.0.48
Let \Let\, v. t. [imp. & p. p. {Let} ({Letted} (l[e^]t"t[e^]d),
   [Obs].); p. pr. & vb. n. {Letting}.] [OE. leten, l[ae]ten
   (past tense lat, let, p. p. laten, leten, lete), AS.
   l[=ae]tan (past tense l[=e]t, p. p. l[=ae]ten); akin to
   OFries. l[=e]ta, OS. l[=a]tan, D. laten, G. lassen, OHG.
   l[=a]zzan, Icel. l[=a]ta, Sw. l[*a]ta, Dan. lade, Goth.
   l[=e]tan, and L. lassus weary. The original meaning seems to
   have been, to let loose, let go, let drop. Cf. {Alas},
   {Late}, {Lassitude}, {Let} to hinder.]
   1. To leave; to relinquish; to abandon. [Obs. or Archaic,
      except when followed by alone or be.]
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            He . . . prayed him his voyage for to let.
                                                  --Chaucer.
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            Yet neither spins nor cards, ne cares nor frets,
            But to her mother Nature all her care she lets.
                                                  --Spenser.
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            Let me alone in choosing of my wife.  --Chaucer.
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   2. To consider; to think; to esteem. [Obs.] --Chaucer.
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   3. To cause; to make; -- used with the infinitive in the
      active form but in the passive sense; as, let make, i. e.,
      cause to be made; let bring, i. e., cause to be brought.
      [Obs.]
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            This irous, cursed wretch
            Let this knight's son anon before him fetch.
                                                  --Chaucer.
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            He . . . thus let do slay hem all three. --Chaucer.
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            Anon he let two coffers make.         --Gower.
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   4. To permit; to allow; to suffer; -- either affirmatively,
      by positive act, or negatively, by neglecting to restrain
      or prevent.
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   Note: In this sense, when followed by an infinitive, the
         latter is commonly without the sign to; as to let us
         walk, i. e., to permit or suffer us to walk. Sometimes
         there is entire omission of the verb; as, to let [to be
         or to go] loose.
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               Pharaoh said, I will let you go.   --Ex. viii.
                                                  28.
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               If your name be Horatio, as I am let to know it
               is.                                --Shak.
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   5. To allow to be used or occupied for a compensation; to
      lease; to rent; to hire out; -- often with out; as, to let
      a farm; to let a house; to let out horses.
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   6. To give, grant, or assign, as a work, privilege, or
      contract; -- often with out; as, to let the building of a
      bridge; to let out the lathing and the plastering.
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   Note: The active form of the infinitive of let, as of many
         other English verbs, is often used in a passive sense;
         as, a house to let (i. e., for letting, or to be let).
         This form of expression conforms to the use of the
         Anglo-Saxon gerund with to (dative infinitive) which
         was commonly so employed. See {Gerund}, 2. " Your
         elegant house in Harley Street is to let." --Thackeray.
         In the imperative mood, before the first person plural,
         let has a hortative force. " Rise up, let us go."
         --Mark xiv. 42. " Let us seek out some desolate shade."
         --Shak.
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   {To let alone}, to leave; to withdraw from; to refrain from
      interfering with.

   {To let blood}, to cause blood to flow; to bleed.

   {To let down}.
      (a) To lower.
      (b) To soften in tempering; as, to let down tools,
          cutlery, and the like.

   {To let fly} or {To let drive}, to discharge with violence,
      as a blow, an arrow, or stone. See under {Drive}, and
      {Fly}.

   {To let in} or {To let into}.
      (a) To permit or suffer to enter; to admit.
      (b) To insert, or imbed, as a piece of wood, in a recess
          formed in a surface for the purpose.

   {To let loose}, to remove restraint from; to permit to wander
      at large.

   {To let off}.
      (a) To discharge; to let fly, as an arrow; to fire the
          charge of, as a gun.
      (b) To release, as from an engagement or obligation.
          [Colloq.]

   {To let out}.
      (a) To allow to go forth; as, to let out a prisoner.
      (b) To extend or loosen, as the folds of a garment; to
          enlarge; to suffer to run out, as a cord.
      (c) To lease; to give out for performance by contract, as
          a job.
      (d) To divulge.

   {To let slide}, to let go; to cease to care for. [Colloq.] "
      Let the world slide." --Shak.
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from The Collaborative International Dictionary of English v.0.48
Blood \Blood\ (bl[u^]d), n. [OE. blod, blood, AS. bl[=o]d; akin
   to D. bloed, OHG. bluot, G. blut, Goth. bl[=o][thorn], Icel.
   bl[=o][eth], Sw. & Dan. blod; prob. fr. the same root as E.
   blow to bloom. See {Blow} to bloom.]
   1. The fluid which circulates in the principal vascular
      system of animals, carrying nourishment to all parts of
      the body, and bringing away waste products to be excreted.
      See under {Arterial}.
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   Note: The blood consists of a liquid, the plasma, containing
         minute particles, the blood corpuscles. In the
         invertebrate animals it is usually nearly colorless,
         and contains only one kind of corpuscles; but in all
         vertebrates, except Amphioxus, it contains some
         colorless corpuscles, with many more which are red and
         give the blood its uniformly red color. See
         {Corpuscle}, {Plasma}.
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   2. Relationship by descent from a common ancestor;
      consanguinity; kinship.
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            To share the blood of Saxon royalty.  --Sir W.
                                                  Scott.
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            A friend of our own blood.            --Waller.
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   {Half blood} (Law), relationship through only one parent.

   {Whole blood}, relationship through both father and mother.
      In American Law, blood includes both half blood, and whole
      blood. --Bouvier. --Peters.
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   3. Descent; lineage; especially, honorable birth; the highest
      royal lineage.
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            Give us a prince of blood, a son of Priam. --Shak.
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            I am a gentleman of blood and breeding. --Shak.
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   4. (Stock Breeding) Descent from parents of recognized breed;
      excellence or purity of breed.
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   Note: In stock breeding half blood is descent showing one
         half only of pure breed. Blue blood, full blood, or
         warm blood, is the same as blood.
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   5. The fleshy nature of man.
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            Nor gives it satisfaction to our blood. --Shak.
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   6. The shedding of blood; the taking of life, murder;
      manslaughter; destruction.
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            So wills the fierce, avenging sprite,
            Till blood for blood atones.          --Hood.
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   7. A bloodthirsty or murderous disposition. [R.]
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            He was a thing of blood, whose every motion
            Was timed with dying cries.           --Shak.
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   8. Temper of mind; disposition; state of the passions; -- as
      if the blood were the seat of emotions.
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            When you perceive his blood inclined to mirth.
                                                  --Shak.
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   Note: Often, in this sense, accompanied with bad, cold, warm,
         or other qualifying word. Thus, to commit an act in
         cold blood, is to do it deliberately, and without
         sudden passion; to do it in bad blood, is to do it in
         anger. Warm blood denotes a temper inflamed or
         irritated. To warm or heat the blood is to excite the
         passions. Qualified by up, excited feeling or passion
         is signified; as, my blood was up.
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   9. A man of fire or spirit; a fiery spark; a gay, showy man;
      a rake.
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            Seest thou not . . . how giddily 'a turns about all
            the hot bloods between fourteen and five and thirty?
                                                  --Shak.
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            It was the morning costume of a dandy or blood.
                                                  --Thackeray.
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   10. The juice of anything, especially if red.
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             He washed . . . his clothes in the blood of grapes.
                                                  --Gen. xiix.
                                                  11.
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   Note: Blood is often used as an adjective, and as the first
         part of self-explaining compound words; as,
         blood-bespotted, blood-bought, blood-curdling,
         blood-dyed, blood-red, blood-spilling, blood-stained,
         blood-warm, blood-won.
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   {Blood baptism} (Eccl. Hist.), the martyrdom of those who had
      not been baptized. They were considered as baptized in
      blood, and this was regarded as a full substitute for
      literal baptism.

   {Blood blister}, a blister or bleb containing blood or bloody
      serum, usually caused by an injury.

   {Blood brother}, brother by blood or birth.

   {Blood clam} (Zool.), a bivalve mollusk of the genus Arca and
      allied genera, esp. {Argina pexata} of the American coast.
      So named from the color of its flesh.

   {Blood corpuscle}. See {Corpuscle}.

   {Blood crystal} (Physiol.), one of the crystals formed by the
      separation in a crystalline form of the h[ae]moglobin of
      the red blood corpuscles; h[ae]matocrystallin. All blood
      does not yield blood crystals.

   {Blood heat}, heat equal to the temperature of human blood,
      or about 981/2 [deg] Fahr.

   {Blood horse}, a horse whose blood or lineage is derived from
      the purest and most highly prized origin or stock.

   {Blood money}. See in the Vocabulary.

   {Blood orange}, an orange with dark red pulp.

   {Blood poisoning} (Med.), a morbid state of the blood caused
      by the introduction of poisonous or infective matters from
      without, or the absorption or retention of such as are
      produced in the body itself; tox[ae]mia.

   {Blood pudding}, a pudding made of blood and other materials.
      

   {Blood relation}, one connected by blood or descent.

   {Blood spavin}. See under {Spavin}.

   {Blood vessel}. See in the Vocabulary.

   {Blue blood}, the blood of noble or aristocratic families,
      which, according to a Spanish prover, has in it a tinge of
      blue; -- hence, a member of an old and aristocratic
      family.

   {Flesh and blood}.
       (a) A blood relation, esp. a child.
       (b) Human nature.

   {In blood} (Hunting), in a state of perfect health and vigor.
      --Shak.

   {To let blood}. See under {Let}.

   {Prince of the blood}, the son of a sovereign, or the issue
      of a royal family. The sons, brothers, and uncles of the
      sovereign are styled princes of the blood royal; and the
      daughters, sisters, and aunts are princesses of the blood
      royal.
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