monotreme

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EnglishEdit

EtymologyEdit

mono- +‎ -treme.

PronunciationEdit

  • Hyphenation: mo‧no‧treme

NounEdit

monotreme ‎(plural monotremes)

Ventral view of a female echidna, a monotreme, showing single orifice.
  1. (zoology) A mammal that lays eggs and has a single urogenital and digestive orifice. Only the echidnas and platypuses are included in this group.

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AdjectiveEdit

monotreme ‎(not comparable)

  1. (palynology, of a pollen grain) Having a single trema, or aperture.
    • 1952, G. Erdtman, Pollen Morphology and Plant Taxonomy[1], published 1986, ISBN 9004081224, page 548:
      Nomotreme fern and moss spores are monotreme.

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