adjective. attached directly by the base; not having an intervening stalk.
- sessilis (Latin)
- sessus (Latin)
Example sentences of the word sessile
These fish won’t harm corals or other sessile invertebrates and are too big to become lunch for most other aquarium creatures.
2. Verb, past participle
Sponges might be sessile but they're not plants and don't photosynthesize.
3. Noun, singular or mass
As a general rule, starfish with smooth skin work well in reef tanks, but starfish with knobby or spiny skin will harm sessile (immobile) invertebrates.