The Collaborative International Dictionary
Hybridism \Hy"brid*ism\, n. The state or quality of being hybrid.
Wiktionary
n. 1 The state of being hybrid. 2 The production of hybrids by cross-breeding. 3 (context linguistics English) The formation of a word from elements of different languages.
Usage examples of "hybridism".
Chapter VIII Hybridism Distinction between the sterility of first crosses and of hybrids -- Sterility various in degree, not universal, affected by close interbreeding, removed by domestication -- Laws governing the sterility of hybrids -- Sterility not a special endowment, but incidental on other differences -- Causes of the sterility of first crosses and of hybrids -- Parallelism between the effects of changed conditions of life and crossing -- Fertility of varieties when crossed and of their mongrel offspring not universal -- Hybrids and mongrels compared independently of their fertility -- Summary.
The two first heads shall be here discussed--Instinct and Hybridism in separate chapters.
Chapter VIII Hybridism Distinction between the sterility of first crosses and of hybrids -- Sterility various in degree, not universal, affected by close interbreeding, removed by domestication -- Laws governing the sterility of hybrids -- Sterility not a special endowment, but incidental on other differences -- Causes of the sterility of first crosses and of hybrids -- Parallelism between the effects of changed conditions of life and crossing -- Fertility of varieties when crossed and of their mongrel offspring not universal -- Hybrids and mongrels compared independently of their fertility -- Summary.
I guess you know that his studies in hybridism and his four-volume work, Osmotic Irregularities among the Sarraceniaceous Plants, are classics.