単たん孔こう類るいたんこうるいじ字FuriganaMeanings1nounmonotremes; Monotrematazoology›Zoological term for the order of egg-laying mammals, including the platypus and echidnas. Used in scientific and educational contexts.See also: カモノハシ目単たん孔こう類るいにはカモノハシやハリモグラ
