| 单词 | prototherian | 
| 释义 | prototherian(ˌprəʊtəʊˈθɪərɪən) adjective 1.  of, relating to, or belonging to the Prototheria, a subclass of mammals that includes the monotremes  noun   Compare eutherian,  metatherian 2.  any prototherian mammal; a monotreme Word origin C19: New Latin, from proto- + Greek thēria wild animals | 
	
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