stibine

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A colorless flammable poisonous gas, SbH₃, having a disagreeable odor and used in the production of semiconductors and sometimes as a fumigant.

from The Century Dictionary.

• noun Antimoniureted hydrogen (SbH₃), a colorless gas of disagreeable odor, poisonous if respired, and burning in the air with a bluish flame: it deposits metallic antimony in spots on a piece of cold porcelain pressed down upon the flame. The gas also deposits the metal by passage through a glass tube heated at one point.
• noun A general term for any compound of antimony with an electropositive or alkyl radical, as triethyl-stibine, Sb(C₂H₅)₃.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Chem.) Antimony hydride, or hydrogen antimonide, a colorless gas produced by the action of nascent hydrogen on antimony. It has a characteristic odor and burns with a characteristic greenish flame. Formerly called also antimoniureted hydrogen.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun mineralogy Stibnite.
• noun chemistry Antimony hydride, SbH3; a poisonous gas, sometimes used as a fumigant; any organic derivative of this compound