noun.
Defective or abnormal development of an organ, especially of the gonads.
The Century Dictionary and Cyclopedia
noun.
Difficulty in breeding; difficult generation; sterility; infecundity.
the GNU version of the Collaborative International Dictionary of English
noun.
A condition of not generating or breeding freely; infertility; a form of homogenesis in which the hybrids are sterile among themselves, but are fertile with members of either parent race.