prototherian Zoology

prototherian Zoology [ˌprəʊtə(ʊ)'θɪərɪən]

noun a mammal of the subclass Prototheria, which comprises the monotremes and their extinct relatives.

adjective relating to prototherians.

Origin

from mod. L. Prototheria, from proto- + Gk thēr 'wild beast'.