"state of being curved," 1540s, from Late Latin curvitatem (nominative curvitas), noun of state from past-participle stem of curvare "to bend, curve" (see curve (v.)).
Entries linking to curvity
curve v.
early 15c. (implied in curved), intransitive, "have or assume a curved form," from Latin curvus "crooked, curved, bent," and curvare "to bend," both from PIE root *sker- (2) "to turn, bend." Transitive sense of "cause to take the shape of a curve, bend" is from 1660s.