instar

from WordNet (r) 3.0 (2006)

instar
    n 1: an insect or other arthropod between molts

from The Collaborative International Dictionary of English v.0.48

Instar \In*star"\, v. t.
   To stud as with stars. [R.] "A golden throne instarred with
   gems." --J. Barlow.
   [1913 Webster]

from The Collaborative International Dictionary of English v.0.48

Instar \In"star`\, n.
   a postembryonic stage of life of an arthropod, especially an
   insect, between two successive molts; also, the arthropod
   when in that stage of life.
   [PJC]

from Bouvier's Law Dictionary, Revised 6th Ed (1856)

INSTAR. Likeness; resemblance; equivalent as, instar dentium, like teeth; 
instar omnium, equivalent to all.

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