freemartin means A female calf, born as twin with a bull calf, but sexually imperfect (often infertile). Lexicurio rates it Sui generis — a strength score of 89 out of 100.
noun
- A female calf, born as twin with a bull calf, but sexually imperfect (often infertile).
- Any female animal born sterile or otherwise infertile.“"Has your cat been spayed?" "I didn't need to: she's a freemartin."”