Thermos Definition

thûrməs
thermoses
noun
thermoses
Such a vessel.
Webster's New World
A vacuum bottle used to keep beverages hot or cold.
American Heritage
Synonyms:
  • thermos flask
  • thermos bottle

Other Word Forms of Thermos

Noun

Singular:
thermos
Plural:
thermoses

Origin of Thermos

  • From Thermos, a trademarked name, from Ancient Greek θερμός (thermos, “warm")

    From Wiktionary

  • Originally a trademark

    From American Heritage Dictionary of the English Language, 5th Edition

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