Adjective: sessile 'se,sI(-u)l or se-sil
- (biology) permanently attached to a substrate; not free to move about
"sessile marine animals and plants"
- (biology) attached directly by the base; not having an intervening stalk
"the shell of a sessile barnacle is attached directly to a substrate"; "sessile flowers";
- stalkless
Antonym: pedunculate, vagile
Encyclopedia: Sessile