/ ˈvɜːteks; NAmE ˈvɜːrt-/ noun ( pl. ver·ti·ces / -tɪsiːz; NAmE / or ver·texes )
( geometry ) a point where two lines meet to form an angle, especially the point of a triangle or cone opposite the base
( technical ) the highest point or top of sth
late Middle English : from Latin , whirlpool, crown of a head, vertex , from vertere to turn.