English Lexicon

Monotreme

/ˈmɒ.nə.triːm/
nounCEFR B2 (Upper)Top #15000 frequency
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Comprehensive Definitions & Senses

2 senses
As noun
  1. 1

    Any of a group of egg-laying mammals that includes the platypus and echidnas.

    "The monotreme is unique among mammals for its reproductive method."
  2. 2

    A member of the order Monotremata, characterized by laying eggs rather than giving birth to live young.

    "Monotremes are fascinating creatures that provide insight into mammalian evolution."

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Antonyms & Contrasting Words (1)

Linguistic Origin & Historical Etymology

The term 'monotreme' is derived from the Greek words 'monos' meaning 'single' and 'trema' meaning 'hole', referring to the single opening for excretion and reproduction in these animals. The concept emerged in the late 19th century as scientists began to classify these unique egg-laying mammals.

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