Dictionary
ec•to•com•men•sal
Pronunciation: (ek"tō-ku-men'sul), [key]—
adj.
Biol.(of an organism) living in a commensal relationship on the exterior of another organism.
—
n.
an ectocommensal organism.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.