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freemartin Syllabification: free·mar·tin
Pronunciation: /ˈfrēˌmärtn/

Definition of freemartin in English:


A hermaphrodite or imperfect sterile female calf that is the twin of a male calf whose hormones affected its development.
Example sentences
  • Lillie looked at the anatomical characteristics of the freemartin, the sexually abnormal co-twin of a male calf, usually possessing female as well as male external genitalia.
  • Although the external genitalia of the freemartin may appear normal, the internal organs are abnormal in greater or lesser degrees.
  • One heifer was later found as a freemartin and, therefore, was excluded from the trial.


Late 17th century: of unknown origin.

Definition of freemartin in:
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