PHOSPHINES
Noun
phosphines
plural of phosphine
Source: Wiktionary
PHOSPHINE
Phos"phine, n. (Chem.)
Definition: A colorless gas, PH3, analogous to ammonia, and having a
disagreeable odor resembling that of garlic. Called also hydrogen
phosphide, and formerly, phosphureted hydrogen.
Note: It is the most important compound of phosphorus and hydrogen,
and is produced by the action of caustic potash on phosphorus. It is
spontaneously inflammable, owing to impurities, and in burning
produces peculiar vortical rings of smoke.
Source: Webster’s Unabridged Dictionary 1913 Edition