phosphine /(fŏs"fēn or fŏs"fĭn)/

phos·phine

phosphine

n.
  1. A colorless gas, PH3, analogous to ammonia, and having a disagreeable odor resembling that of garlic. Called also hydrogen phosphide, and formerly, phosphureted hydrogen. It is postulated as one possible cause of the rare lights seen in marshes -- see ignis fatuus. (Chem.)

Phosphine

n.
  1. Chrysaniline, often in the form of a salt. (Dyeing)