(1) Of, pertaining to, or relating to the state of sessility or the inability to move actively or spontaneously.
(2) Of, or pertaining to being permanently attached to the substrate or to the base, hence, not freely moving.
(3) (botany) Of, or pertaining to the lack of petiole or leafstalk in some plants.
Word origin: Neo-Latin sessilis, sitting
Related forms: sessility (noun)