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See more synonyms for instar on Thesaurus.com
  1. an insect in any one of its periods of postembryonic growth between molts.
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Origin of instar1

1890–95; < New Latin, Latin īnstar equivalent, counterpart


verb (used with object), in·starred, in·star·ring.
  1. to set with or as if with stars.
  2. Archaic.
    1. to place as a star.
    2. to make a star of.
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Origin of instar2

First recorded in 1585–95; in-1 + star
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for instar

Historical Examples

  • He certainly will, if he found it published, and that alone will be instar omnium.

    The Works of William Cowper

    William Cowper

  • Greek taken singly is, to use an indispensable Latin word, instar, the knowledge of all other languages.

  • Though he has been but few hours under my roof, I have already peeped at him, and find that he will be instar omnium to me.

  • Instar montis equum divina Palladis arte Aedificant, sectaque intexunt abiete costas; Votum pro reditu simulant.

    Uppingham by the Sea

    John Henry Skrine

  • However, nymphs after the fourth instar occasionally set upon other molting nymphs.

British Dictionary definitions for instar


  1. the stage in the development of an insect between any two moults
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Word Origin

C19: New Latin from Latin: image
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

instar in Medicine


  1. Any of the successive nymphal stages in the metamorphosis of insects or the stages of larval change by successive molts.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.