/pat"yoo lin, pach"oo-/ , n. Pharm.
a toxic antibiotic, C 7 H 6 O 4 , derived from various fungi, as Penicillium patulum and Aspergillus clavatus. Also called clavacin .
[ 1940-45; patul ( um ) specific epithet of the fungus (L: neut. of patulus PATULOUS) + -IN 2 ]