Pertaining to an ellipse; having the form of an ellipse.Pertaining to or marked by ellipsis; defective; having a part left out.In entomology, elongate-ovate; more than twice as long as broad, parallel-sided in the middle, and rounded at both ends, but in general more broadly so at the base: applied especially to the abdomen, as in many Hymenoptera.In mathematics, having a pair of characteristic elements imaginary: as, an elliptic involution.See space.