BACKCROSS is validvalid

to breed a hybrid with something similar to its parent [v BACKCROSSED, BACKCROSSES, BACKCROSSING]

90,823 of 196,601 in NWL2023·also valid in CSW24

a cross between a hybrid and a parent [n -ES] / to create a cross between a hybrid and a parent [v -ED, -ING, -ES]