Defn: A ketone derivative of thiophene obtained as a white crystalline substance, (C4H3S)2.CO, by the action of aluminium chloride and carbonyl chloride on thiophene.

THIENYL
Thi"ë*nyl, n. Etym: [Thiophene + -yl.] (Chem.)

Defn: The hypothetical radical C4H3S, regarded as the essential residue of thiophene and certain of its derivatives.

THIEVE
Thieve, v. t. & i. [imp. & p. p. Thieved; p. pr. & vb. n. Thieving.]
Etym: [AS. ge.]

Defn: To practice theft; to steal.

THIEVERY
Thiev"er*y, n.

1. The practice of stealing; theft; thievishness. Among the Spartans, thievery was a practice morally good and honest. South.

2. That which is stolen. [Obs.] Shak.

THIEVISH
Thiev"ish, a.

1. Given to stealing; addicted to theft; as, a thievish boy, a thievish magpie.