- Genetics a new hybrid produced by crossing two existing hybrids (A × B ? AB, C × D ? CD, AB × CD ? ABCD)
- Informal a double-crossing; treachery
transitive verbdou·ble-crossed, dou·ble-cross·ing, dou·ble-cross·es
- often double cross An act of betraying an ally, friend, or associate.
- double cross Genetics A cross in which each parent is the product of a single cross. It can be represented as AB &botx; CD, where A, B, C, and D are inbred lines.
(third-person singular simple present double-crosses, present participle double-crossing, simple past and past participle double-crossed)
- To betray or go back on