prototherian

名词 n. 形容词 adj.
中文释义

英文释义

名词 n.
  1. Any of the egg-laying mammals of the subclass Prototheria; a monotreme.
    — Monotremes (prototherians), which include the duck-billed platypus, and short- and long-beaked echidnas, have a cloaca—a single opening for the fecal, urinary, and reproductive tracts.
形容词 adj.
  1. Belonging or pertaining to the subclass Prototheria.
    — It is evident that the Edentates are widely separated from all other existing Eutherians; and Professor W. K. Parker, in view of the tendency to a variation in the number of cervical vertebræ and other features, has suggested a separate origin from a Prototherian stock.

词形变化

more prototherian comparative most prototherian superlative prototherians plural

词源

词源 1
From translingual Prototheria + -an, from Ancient Greek πρωτο- (prōto-, “proto-, first”) + θηρίον (thēríon, “beast”).
词源 2
From translingual Prototheria + -an, from Ancient Greek πρωτο- (prōto-, “proto-, first”) + θηρίον (thēríon, “beast”).
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