stirps
stirps \'sti(*)rps, 'st*rps\ \'sti(*)r-.pa-s, 'st*r-(.)pe-z\ n or stir.pes [L, lit., stem, stock - more at TORPID] pl 1: a branch of a family or the person from whom it is descended 2a: a group of animals equivalent to a superfamily 2b: a race or fixed variety of plants