cilium
A specialized eukaryotic organelle that consists of a filiform extrusion of the cell surface and of some cytoplasmic parts. Each cilium is largely bounded by an extrusion of the cytoplasmic (plasma) membrane, and contains a regular longitudinal array of microtubules, anchored to a basal body.
GO:0043227
membrane-bounded organelle
is_a
GO:0120025
plasma membrane bounded cell projection
is_a
eukaryotic flagellum
exact
flagellum
related
microtubule-based flagellum
exact
primary cilium
narrow