sessile

Definition

Permanently attached to a substrate; not free to move about.

Etymology

From Latin sessilis (“sitting”), from sessus, perfect passive participle of verb sedeō (“to sit”), + adjective suffix -ilis. Compare session.

Example Sentences

• "a sessile oyster"
• "The pileus is sessile, or sometimes narrowed at the base into a short stem, the caps often numerous and crowded together in an overlapping or imbricate manner."
• "The sporophyte foot is also characteristic: it is very broad and more or less lenticular or disciform, as broad or broader than the calyptra stalk[…], and is sessile on the calyptra base[…]"