SESSILE
sessile, stalkless
(adjective) attached directly by the base; not having an intervening stalk; “sessile flowers”; “the shell of a sessile barnacle is attached directly to a substrate”
sessile
(adjective) permanently attached to a substrate; not free to move about; “sessile marine animals and plants”
Source: WordNet® 3.1
Etymology
Adjective
sessile (not comparable)
(zoology) Permanently attached to a substrate; not free to move about.
(botany) Attached directly by the base; not having an intervening stalk; stalkless.
Synonyms
• (not free to move): attached, fixed, immobile
Antonyms
• (not free to move): mobile
Anagrams
• lessies
Source: Wiktionary
Ses"sile, a. Etym: [L. sessilis low, dwarf, from sedere, sessum, to
sit: cf. F. sessile.]
1. Attached without any sensible projecting support.
2. (Bot.)
Definition: Resting directly upon the main stem or branch, without a
petiole or footstalk; as, a sessile leaf or blossom.
3. (Zoöl.)
Definition: Permanently attached; -- said of the gonophores of certain
hydroids which never became detached.
Source: Webster’s Unabridged Dictionary 1913 Edition