sexupareEnt.|ˈsɛksjuːpɛə(r)| [ad.mod.L. sexupar-um, neut. of sexuparus: see next.] ‘In the plant lice, one of the parents of the sexed generation, usually developed late in the season’ (Cent.Dict. 1909). 18..U.S.Dept. Agr., Div.Entom., Bulletin 44 p. 8 (Cent.) The sexupares or return migrants.