a combining form representing picric or picric acid in compound words: picramic acid.
a combining form meaning “bitter”, used in the formation of compound words: picrite.
Also, especially before a vowel, picr-.
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World English Dictionary
picro- or (before a vowel) picr-
combining form
bitter: picrotoxin
[from Greek pikros]
picr- or (before a vowel) picr-
combining form
[from Greek pikros]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

picro- or picr-

  1. Bitter: picrotoxin.

  2. Picric acid: picrate.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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