thermos

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thermos¹

  • /ˈθɜː.mɒs/ UK
  • /ˈθɝ.məs/ Canada, US

Where it comes from

Genericization of the trademark Thermos, from Ancient Greek θερμός (thermós, “warm”). Possibly related to English warm.

noun thermoses · thermoi · Thermos

  1. A bottle, flask or similar vessel having a vacuum between its inner and outer silvered walls; designed to maintain the temperature of its contents

    Similar: thermal flask, thermos flask, vacuum flask

thermos²

Where it comes from

Borrowed from Ancient Greek θέρμος (thérmos).

noun thermoi

  1. historical A unit of measure whose identification remains very unclear. The mnaeion contains 4 gold pieces, 16 quarters, 64 thermoi, 128 carats. The gold piece contains 4 staters [sic for quarters], 16 thermoi, 32 carats. The thermos contains 2 carats. The quarter contains 4 thermoi, 8 carats. The thermos contains 2 carats.[…]The mnaeion has sixteen (16) quarters and th

Thermos³

Where it comes from

Transliteration of Ancient Greek Θέρμος (Thérmos).

proper noun

  1. historical The ancient capital and sanctuary in Aetolia, Greece.

    Similar: Thermon, Thermum

Translations

Every language

noun vacuum flask

Españoltermo
한국어보온병 boonbyeong
日本語魔法瓶 mahōbin
中文熱水瓶 /热水瓶 rèshuǐpíng, 暖瓶 nuǎnpíng, 暖壺 /暖壶 nuǎnhú
हिन्दीथरमस tharmas, निर्वात फ़्लास्क nirvāt flāsk
Kiswahilichupa ombwe
Portuguêsgarrafa térmica, termo
Françaisthermos
DeutschThermoskanne
Italianotermos
Ελληνικάθερμός thermós
Românătermos
Русскийте́рмос tɛ́rmos
Tiếng Việtphích, bình thuỷ, phích nước
العربيةتِرْمُس tirmus, كَظِيمَة kaẓīma
עבריתתֶּרְמוֹס térmos

name Ancient Greek sanctuary

РусскийФерм Ferm, Фермон Fermon

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Cite this
MLA

"thermos." Wiktionary, via Micwyn, micwyn.com/word/thermos. Accessed 6 Nov. 2026.

APA

thermos. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/thermos

Chicago

"thermos." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/thermos.

BibTeX
@misc{thermos_2026,
  title = {thermos},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/thermos},
  urldate = {2026-11-06}
}