monotreme

名词 monotreme:

1. the most primitive mammals comprising the only extant members of the subclass Prototheria
   同义词：egg-laying mammal

mon.o.treme

n.（名词）
A member of the Monotremata, an order of primitive egg-laying mammals restricted to Australia and New Guinea and consisting of only the platypus and the echidna.
单孔目动物：单孔目动物中的一员，是远古蛋生哺乳动物的一目，限生活于澳大利亚和新几内亚地区，只有鸭嘴兽和针鼹种类

来源：
From New Latin Monotremata [order name]
源自 现代拉丁语 Monotremata [纲目名称]
mono-
mono-
Greek trôma [perforation] * see ter…-
希腊语 trôma [孔] *参见 ter…-

【引伸】
mon.otrem.atous