sessile definition by Webster's New World
- attached directly by its base
- permanently fixed; immobile
- Bot. having no pedicel or peduncle; attached directly to the main stem, as the flower and leaves of a trillium plant
Origin: Classical Latin sessilis ; from sessus, past participle of sedere, to sit
sessile definition by American Heritage Dictionary
- Botany Stalkless and attached directly at the base: sessile leaves.
- Zoology Permanently attached or fixed; not free-moving: a sessile barnacle.
Origin: Latin sessilis, low, of sitting, from sessus, past participle of sedēre, to sit; see sed- in Indo-European roots.
- ses·silˈi·ty noun
sessile - Medical Definition
sessile - Science Definition
- Permanently attached or fixed and not free-moving, as corals and mussels.
- Stalkless and attached directly at the base, as certain kinds of leaves and fruit.