Two pieces on the back of an item (for attaching or bracing it) which form an "X". / An "X"-shaped railroad crossing sign. / (derogatory, offensive) A Catholic.

To cross a hybrid species with one of the original parent species.

plural of crossback

Third-person singular simple present indicative form of crossback

present participle of crossback

simple past tense and past participle of crossback

Having a cross on the back.