free·mar·tin \ˈfrēˌmär]tən, -mȧ], ]d.ə̇n, ]tə̇n\noun Etymology: probably from free (I) + -martin (perhaps alteration of mart beef animal fattened for slaughter) — more at mart : a sexually imperfect usually sterile female calf twinborn with a male; also: a similar female of another species