gossypol

[gos-uh-pawl, -pol]

gos·sy·pol

[gos-uh-pawl, -pol]
noun
a toxic pigment, C30H30O8, derived from cottonseed oil, made nontoxic by heating, presently under study as a potential male contraceptive and antimicrobial.

Origin:
1895–1900; < Neo-Latin Gossyp(ium) (see gossypose) + -ol1
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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Gossypol is always a great word to know.
So is interrobang. Does it mean:
a chattering or flighty, light-headed person.
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
Collins
World English Dictionary
gossypol (ˈɡɒsɪˌpɒl)
 
n
a toxic crystalline pigment that is a constituent of cottonseed oil
 
[C19: from Modern Latin gossypium cotton plant + -ol1]

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

gossypol gos·sy·pol (gŏs'ə-pôl', -pōl')
n.
A toxic pigment obtained from cottonseed oil and detoxified by heating, shown to inhibit sperm production.

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