WordReference Random House Unabridged Dictionary of American English © 2026
back•cross
(bak′krôs′, -kros′),USA pronunciation [Genetics.]
v.t.
n.
v.t.
- Geneticsto cross (a hybrid of the first generation) with either of its parents.
n.
- Geneticsan instance of such crossing.
- back2 + cross 1900–05