Definition of topcross
: a cross between a superior or purebred male and inferior female stock to improve the average quality of the progeny; also : the product of such a cross
First Known Use of topcross
Learn More about topcross
Britannica.com: Encyclopedia article about topcross
Seen and Heard
What made you want to look up topcross? Please tell us where you read or heard it (including the quote, if possible).