stereocilium
An actin-based protrusion from the apical surface of auditory and vestibular hair cells and of neuromast cells. These protrusions are supported by a bundle of cross-linked actin filaments (an actin cable), oriented such that the plus (barbed) ends are at the tip of the protrusion, capped by a tip complex which bridges to the plasma. Bundles of stereocilia act as mechanosensory organelles.
GO:0043005
neuron projection
is_a
GO:0098858
actin-based cell projection
is_a
GO:0032421
stereocilium bundle
part_of