Wiktionary:Word of the day/December 14

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Word of the day for December 14
instar n
  1. Any one of the several stages of postembryonic development which an arthropod undergoes, between molts, before it reaches sexual maturity: the hopper was placed in a box in its first instar.
  2. An arthropod at a specified one of these stages: first and second instars of this species are more susceptible to H. bacteriophora than later instars.
  3. A stage in development: "photographs of the landlady’s children in all their instars" (Vladimir Nabokov, Lolita).

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