[gos-uh-pawl, -pol]
a toxic pigment, C 30 H 30 O 8 , derived from cottonseed oil, made nontoxic by heating, presently under study as a potential male contraceptive and antimicrobial.

1895–1900; < Neo-Latin Gossyp(ium) (see gossypose) + -ol1

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World English Dictionary
gossypol (ˈɡɒsɪˌpɒl)
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')
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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Example sentences
Remove the gossypol, however, and you'd have a cheap and abundant form of protein for everyone.
However, all contain gossypol, a naturally occurring toxin produced by the cotton plant.
Determine gossypol solubility in acetone as a function of temperature and the solute crystal form.
We also tested whether insect mortality and fitness costs were affected by the cotton phytochemical gossypol.
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