Dictionary
pi•per'o•nyl butox'ide
Pronunciation: (pi-per'u-nl, pī-, pip'ur-u-nil), [key] Chem.
a light-brown liquid, C
19H
30O
5, used chiefly as a synergist in certain insecticides.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.