intercross verb 2noun 1forms 3 verb2 •To cross back over one anotherFrom this trunk, like a tower, rose an enormous tenfold ramification, the branches of which crossed and intercrossed, and forked and developed, […] — 1895 •To breed two strains having a common ancestry with one anotherA species varies occasionally in two directions, but owing to their free intercrossing they (the variations) never increase. — 1916 noun1 •The act or product of intercrossingIntercrosses are particularly useful with recessive mutations maintained in a small colony. — 2000 formsintercrossed · intercrossing · intercrosses