thermos

T1H4E1R1M3O1S1
UK/ˈθɜː.mɒs/Canada, US/ˈθɝ.məs/

noun

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 flaskthermos flaskvacuum flaskThermonThermumthermos bottle
Less commonScrabble 12

Meanings

thermos1

nounthermos (plural thermoses or (rare) thermoi)

plural thermoses · plural rare thermoi · alternative 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

    Synonyms: thermal flask, thermos flask, vacuum flask

thermos2

nounthermos (plural thermoi)

plural thermoi

  1. historicalA unit of measure whose identification remains very unclear.

    1 saton (seʾah) = 1/3 ephah (see above for correction) = 2/3 bath / mina by weight = 50 shekels / ¼ shekel = 4 thermoi / shekel = 16 thermoi and one weight (?)

    2005, Lawrence H[arvey] Schiffman, “Sacrificial Halakhah in the Fragments of the Aramaic Levi Document from Qumran, the Cairo Genizah, and Mt. Athos Monastery”, in Esther G[lickler] Chazon, Devorah Dimant, Ruth A[nne] Clements, editors, Reworking the Bible: Apocryphal and Related Texts at Qumran: […], Leiden; Boston, Mass.: Brill, →ISBN, →ISSN, page 199
    2 more examples

    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 the quarter has 6 thermoi, twelve (12) carats. The thermos has 2 carats, so that the mnaeion consists of 96 thermoi, 192 carats. The mnaeion weighs 8 drachmas, the quarter three obols, the thermos one-half obol, the carat 2 chalci.[…]Thermoi of 2 and of 1½ siliquae are attested in metrological writings (MSR II 180, s.v. θέρμοϲ); ½ ob. per thermus^([sic]) in 18 implies the lighter weight, as 1 ob. = 3 sil.[…]The mnaeion has 16 quarters and the quarter has (4 or 6) thermoi…

    1982, “Metrology (3455–3460)”, in A[dam] Bülow-Jacobsen, J[ohn] E[dwin] G[eorge] Whitehorne, editors, The Oxyrhynchus Papyri (Graeco-Roman Memoirs; No. 69), volume XLIX, […] for the British Academy by the Egypt Exploration Society, […], →ISBN, →ISSN, pages 101, 104, and 105

    A third of a seah is a third of an ephah, and two-thirds of a bath, and the weight of a mina is fifty of shekels, and a quarter of a shekel is the weight of four thermoi.ᵍ Let the shekel be about sixteen thermoi and of one weight.[…]g. “thermoi”—A unit of measure whose identification remains very unclear.

    2013, James R. Davila, “Aramaic Levi”, in Richard Bauckham, James R. Davila, Alex Panayotov, editors, Old Testament Pseudepigrapha: More Noncanonical Scriptures, volume one, Grand Rapids, Mich.; Cambridge: William B. Eerdmans Publishing Company, →ISBN, page 138

Thermos3

proper noun
  1. historicalThe ancient capital and sanctuary in Aetolia, Greece.

    Synonyms: Thermon, Thermum

Synonyms & antonyms

nounA 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 flaskthermos flaskvacuum flask

proper nounThe ancient capital and sanctuary in Aetolia, Greece.

Similar
ThermonThermum

More synonyms by meaning

nounvacuum flask that preserves temperature of hot or cold drinks

Similar
thermos bottlethermos flask

Synonym sets from Open English WordNet, CC BY 4.0.

Origin

thermos · noun

  1. Ancient Greekθερμός“warm”
  2. Englishthermos

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

Full word history & related roots →

thermos · noun

  1. Ancient Greekθέρμος
  2. Ancient Greekθέρμος
  3. Englishthermos

Borrowed from Ancient Greek θέρμος (thérmos).

Full word history & related roots →

Thermos · proper noun

Transliteration of Ancient Greek Θέρμος (Thérmos).

Full word history & related roots →

Translations

Ancient Greek Θέρμος, Θέρμον
  • Θέρμος (Thérmos)Ancient Greek sanctuary
  • Θέρμον (Thérmon)Ancient Greek sanctuary
Arabic تِرْمُس, كَظِيمَة
  • تِرْمُس (tirmus)vacuum flask
  • كَظِيمَة (kaẓīma)vacuum flask
Bengali থার্মোফ্লাস্ক
  • থার্মোফ্লাস্ক (tharmōphlasko)vacuum flask
Bulgarian те́рмос
  • те́рмос (térmos)vacuum flask
Catalan termos
  • termosvacuum flask
Chinese Cantonese 暖壺 /暖壶
  • 暖壺 /暖壶vacuum flask
Chinese Mandarin 熱水瓶 /热水瓶, 暖瓶
  • 熱水瓶 /热水瓶 (rèshuǐpíng)vacuum flask
  • 暖瓶 (nuǎnpíng)vacuum flask
  • 暖壺 /暖壶 (nuǎnhú)vacuum flask
Czech termoska, termoláhev
  • termoskavacuum flask
  • termoláhevvacuum flask
Esperanto termoso, termobotelo
  • termosovacuum flask
  • termobotelovacuum flask
  • izolkruĉovacuum flask
  • varmobotelovacuum flask
Estonian termos
  • termosvacuum flask
Finnish termospullo, termos
  • termospullovacuum flask
  • termosvacuum flask
French thermos
  • thermosvacuum flask
German Thermoskanne
  • Thermoskannevacuum flask
Greek θερμός
  • θερμός (thermós)vacuum flask
Hebrew תֶּרְמוֹס
  • תֶּרְמוֹס (térmos)vacuum flask
Hindi थरमस, निर्वात फ़्लास्क
  • थरमस (tharmas)vacuum flask
  • निर्वात फ़्लास्क (nirvāt flāsk)vacuum flask
Hungarian termosz
  • termoszvacuum flask
Indonesian termos
  • termosvacuum flask
Italian termos
  • termosvacuum flask
Japanese 魔法瓶
  • 魔法瓶 (mahōbin)vacuum flask
Korean 보온병
  • 보온병 (boonbyeong)vacuum flask
Latin Thermum
  • ThermumAncient Greek sanctuary
Latvian termoss, termospudele
  • termossvacuum flask
  • termospudelevacuum flask
Lithuanian termosas
  • termosasvacuum flask
Malay termos
  • termosvacuum flask
Polish termos
  • termosvacuum flask
Portuguese garrafa térmica, termo
  • garrafa térmicavacuum flask
  • termovacuum flask
Romanian termos
  • termosvacuum flask
Russian те́рмос, Ферм
  • те́рмос (tɛ́rmos)vacuum flask
  • Ферм (Ferm)Ancient Greek sanctuary
  • Фермон (Fermon)Ancient Greek sanctuary
Slovak termoska
  • termoskavacuum flask
Spanish termo
  • termovacuum flask
Swahili chupa ombwe
  • chupa ombwevacuum flask
Swedish termos
  • termosvacuum flask
Tagalog termos
  • termosvacuum flask
Thai กระติก, กระติกน้ำร้อน
  • กระติก (grà-dtìk)vacuum flask
  • กระติกน้ำร้อน (grà-dtìk-náam-rɔ́ɔn)vacuum flask
Turkish termos
  • termosvacuum flask
Ukrainian те́рмос
  • те́рмос (térmos)vacuum flask
Urdu تَھرْموس, تَھرْماس
  • تَھرْموس (tharmos)vacuum flask
  • تَھرْماس (tharmās)vacuum flask
Vietnamese phích, bình thuỷ
  • phíchvacuum flask
  • bình thuỷvacuum flask
  • phích nướcvacuum flask
Welsh Thermos, fflasg thermos
  • Thermosvacuum flask
  • fflasg thermosvacuum flask
  • fflasg wactodvacuum flask

Rhymes & wordplay

Anagrams

Cite this entry
APA

thermos. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/thermos

MLA

“thermos.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/thermos. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “thermos,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/thermos.

Source: thermos on Wiktionary, CC BY-SA 4.0.