stereocilium

noun
ste·reo·cil·i·um | \-ˈsil-ē-əm \
plural stereocilia\-ē-ə \

Medical Definition of stereocilium 

: a specialized microvillus that superficially resembles a cilium and projects from the surface of certain cells (as the auditory hair cells and the superficial epithelial cells of the epididymis) — see kinocilium

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