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词汇 protomammal
释义

Definition of protomammal in English:

protomammal

noun
  • (An informal name for) a hypothetical primitive mammal or a known evolutionary ancestor of the mammals.

Origin

1930s.

Definition of protomammal in US English:

protomammal

noun
  • (An informal name for) a hypothetical primitive mammal or a known evolutionary ancestor of the mammals.

Origin

1930s.

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