The Collaborative International Dictionary
Opuscle
Opuscle \O*pus"cle\ ([-o]*p[u^]s"'l), Opuscule \O*pus"cule\ ([-o]*p[u^]s"k[-u]l), n. [L. opusculum, dim. of opus work: cf. F. opuscule.] A small or petty work.
Wiktionary
opuscle
n. (obsolete form of opuscule English)