phosphine

[fos-feen, -fin]
noun Chemistry.
1.
a colorless, poisonous, ill-smelling, flammable gas, PH 3 .
2.
any of certain organic derivatives of this compound.

Origin:
1870–75; phosph- + -ine1

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phosphine (ˈfɒsfiːn)
 
n
a colourless flammable gas that is slightly soluble in water and has a strong fishy odour: used as a pesticide. Formula: PH3

Collins English Dictionary - Complete & Unabridged 10th Edition
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Encyclopedia Britannica
Encyclopedia

phosphine

a colourless, flammable, extremely toxic gas, with a disagreeable, garlic-like odour. Phosphine is formed by the action of a strong base or hot water on white phosphorus or by the reaction of water with calcium phosphide (Ca3P2). Phosphine is structurally similar to ammonia (NH3), but phosphine is a much poorer solvent than ammonia and is much less soluble in water.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
Exposure to phosphine can cause abdominal pain, nausea, and vomiting.
May produce highly toxic and flammable phosphine gas in the presence of strong reducing agents such as hydrides.
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