牝ひん鶏けいひんけいMeanings1nounhenRefers specifically to a female chicken. The cross-reference to 雌鶏 (めんどり) suggests it may be a less common or more formal/technical synonym.See also: 雌鶏牝ひん鶏けいが卵たまごを産うんだ。The hen laid an egg.