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picro-

American  
especially before a vowel, picr-.
  1. a combining form representing picric or picric acid in compound words.

    picramic acid.

  2. a combining form meaning “bitter”, used in the formation of compound words.

    picrite.


picro- British  

combining form

  1. bitter

    picrotoxin

"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

Etymology

Origin of picro-

from Greek pikros

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