Second hand

from WordNet (r) 3.0 (2006)
second hand
    adv 1: from a source of previously owned goods; "I prefer to buy
           second hand"
    n 1: an intermediate person; used in the phrase `at second
         hand'; "he could learn at second hand from books"
    2: hand marking seconds on a timepiece
    
from The Collaborative International Dictionary of English v.0.48
Second \Sec"ond\, n.
   1. One who, or that which, follows, or comes after; one next
      and inferior in place, time, rank, importance, excellence,
      or power.
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            Man
            An angel's second, nor his second long. --Young.
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   2. One who follows or attends another for his support and
      aid; a backer; an assistant; specifically, one who acts as
      another's aid in a duel.
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            Being sure enough of seconds after the first onset.
                                                  --Sir H.
                                                  Wotton.
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   3. Aid; assistance; help. [Obs.]
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            Give second, and my love
            Is everlasting thine.                 --J. Fletcher.
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   4. pl. An article of merchandise of a grade inferior to the
      best; esp., a coarse or inferior kind of flour.
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   5. [F. seconde. See {Second}, a.] The sixtieth part of a
      minute of time or of a minute of space, that is, the
      second regular subdivision of the degree; as, sound moves
      about 1,140 English feet in a second; five minutes and ten
      seconds north of this place.
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   6. In the duodecimal system of mensuration, the twelfth part
      of an inch or prime; a line. See {Inch}, and {Prime}, n.,
      8.
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   7. (Mus.)
      (a) The interval between any tone and the tone which is
          represented on the degree of the staff next above it.
      (b) The second part in a concerted piece; -- often
          popularly applied to the alto.
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   8. (Parliamentary Procedure) A motion in support of another
      motion which has been moved in a deliberative body; a
      motion without a second dies without discussion.
      [PJC]

   {Second hand}, the hand which marks the seconds on the dial
      of a watch or a clock.
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