different between vacuum vs thermos

English

Alternative forms

• vacuüm (rare)

Etymology

From Latin vacuum (“an empty space, void”), noun use of neuter of vacuus (“empty”), related to vacare (“be empty”).

Pronunciation

• IPA^(key): /?væ.kju?m/, /?væ.kju?.?m/

Noun

vacuum (plural vacuums or (rare) vacua) (see usage notes)

1. A region of space that contains no matter.
2. (plural only "vacuums") A vacuum cleaner.
3. The condition of rarefaction, or reduction of pressure below that of the atmosphere, in a vessel, such as the condenser of a steam engine, which is nearly exhausted of air or steam, etc.

   a vacuum of 26 inches of mercury, or 13 pounds per square inch

4. (physics) A spacetime having tensors of zero magnitude

Usage notes

• The Latin in vacuo is sometimes used instead of in a vacuum (in free space).

Synonyms

• (a region of space that contains no matter): vacancy, void
• (vacuum cleaner): hoover (British)

Antonyms

• (region of space that contains no matter): plenum

Derived terms

Related terms

Translations

Verb

vacuum (third-person singular simple present vacuums, present participle vacuuming, simple past and past participle vacuumed)

1. (transitive) To clean (something) with a vacuum cleaner.
2. (intransitive) To use a vacuum cleaner.
3. (transitive, databases) To optimise a database or database table by physically removing deleted tuples.

Synonyms

• (transitive sense): to hoover (British)
• (intransitive sense): to do the hoovering, to hoover (British)

Translations

French

Pronunciation

• IPA^(key): /va.k??m/

Noun

vacuum m (plural vacuums)

1. vacuum (space containing no matter)

Synonyms

• vide

Descendants

• Turkish: vakum

Further reading

• “vacuum” in Trésor de la langue française informatisé (The Digitized Treasury of the French Language).

Latin

Adjective

vacuum

1. accusative neuter singular of vacuus

Romanian

Etymology

From Latin vacuum

Noun

vacuum n (plural vacuumuri)

1. vacuum

Declension

Spanish

Alternative forms

• vácuum (recommended)

Noun

vacuum m (plural vacuums)

1. vacuum

English

Etymology 1

From Thermos, a trademarked name, from Ancient Greek ?????? (thermós, “warm”).

Pronunciation

• (Received Pronunciation) IPA^(key): /????.m?s/
• (General American, Canada) IPA^(key): /???.m?s/

Noun

thermos (plural thermoses)

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

• vacuum flask

Translations

See also

• dewar

Further reading

• thermos on Wikipedia.Wikipedia

Etymology 2

From Ancient Greek ?????? (thérmos).

Noun

thermos (plural thermoi)

1. (historical) A unit of measure whose identification remains very unclear.

Anagrams

• moth-ers, mothers, smother

French

Etymology

Genericized trademark.

Pronunciation

• IPA^(key): /t??.mos/, /t??.m?s/

Noun

thermos m (plural thermos)

1. thermos

Further reading

• “thermos” in Trésor de la langue française informatisé (The Digitized Treasury of the French Language).