transiently

from WordNet (r) 3.0 (2006)
transiently
    adv 1: for a very short time; "these three pions may actually be
           joined together transiently as a compound particle during
           the interchange process"
    
from The Collaborative International Dictionary of English v.0.48
Transient \Tran"sient\, a. [L. transiens, -entis, p. pr. of
   transire, transitum, to go or pass over. See {Trance}.]
   1. Passing before the sight or perception, or, as it were,
      moving over or across a space or scene viewed, and then
      disappearing; hence, of short duration; not permanent; not
      lasting or durable; not stationary; passing; fleeting;
      brief; transitory; as, transient pleasure. "Measured this
      transient world." --Milton.
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   2. Hasty; momentary; imperfect; brief; as, a transient view
      of a landscape.
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   3. Staying for a short time; not regular or permanent; as, a
      transient guest; transient boarders. [Colloq. U. S.]
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   Syn: {Transient}, {Transitory}, {Fleeting}.

   Usage: Transient represents a thing as brief at the best;
          transitory, as liable at any moment to pass away.
          Fleeting goes further, and represents it as in the act
          of taking its flight. Life is transient; its joys are
          transitory; its hours are fleeting.
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                What is loose love? A transient gust. --Pope
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                If [we love] transitory things, which soon
                decay,
                Age must be loveliest at the latest day.
                                                  --Donne.
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                O fleeting joys
                Of Paradise, dear bought with lasting woes.
                                                  --Milton.
          [1913 Webster] -- {Tran"sient*ly}, adv. --
          {Tran"sient*ness}, n.
          [1913 Webster]
    

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