part of part of has part has part has_part characteristic of has modifier vestibular hair cell stereocilium bundle abnormal vestibular hair cell morphology abnormal vestibular hair cell stereociliary bundle morphology abnormal vestibular hair cell stereocilia MP:0004515 any structural anomaly or disruption of the typical staircase-like arrangement of the mechanosensitive hair bundles which are composed of thick long microvilli (stereocilia) and are located at the apical end of vestibular hair cells of the utricle and saccule MPheno.ontology abnormal vestibular hair cell stereociliary bundles abnormal vestibular hair bundles morphology abnormal