noun. a hairlike projection from the surface of a cell; provides locomotion in free-swimming unicellular organisms.
- cell organ
- cell organelle
noun. any of the short curved hairs that grow from the edges of the eyelids.
Sentences with cilium
1. Noun, singular or mass
The structure of a cilium is a bundle of microtubules, known as an axoneme, that is attached to a basal body on the cell surface.