stereocilium

noun
ste·​reo·​cil·​i·​um | \ -ˈsil-ē-əm How to pronounce stereocilium (audio) \
plural stereocilia\ -​ē-​ə How to pronounce stereocilia (audio) \

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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