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单词 vacuum flasks
释义

vacuum /vakˈū-əm, -ūm or -yŭm/

noun (pl vacˈūums or (not of the cleaner) vacˈua /-ū-ə/)
  1. A space completely empty of matter
  2. A space from which air has been excluded as completely as possible
  3. A space containing gas at a pressure lower than atmospheric
  4. An emptiness or void left where something has ceased or been removed
  5. A condition of isolation or insulation from outside forces and influences
  6. A vacuum cleaner (informal)
transitive verb and intransitive verb

To clean with a vacuum cleaner

adjective
  1. Relating to a vacuum
  2. Containing a vacuum
  3. Operating by means of a vacuum
ORIGIN: L, neuter of vacuus empty

vacˈūist noun

A person who thinks there are empty spaces in nature

vacuum brake noun

A brake in the working of which suction by vacuum(s) supplements the pressure applied by the operator, esp a braking system of this type applied simultaneously throughout a train

vacˈūum-clean transitive verb and intransitive verb

vacuum cleaner noun

An apparatus for removing dust by suction

vacuum cleaning noun

vacuum concrete noun

Concrete enclosed in special shuttering which enables suction to be applied to remove excess water

vacuum flask noun

An insulated flask for keeping substances hot or cold by means of a vacuum lining

vacuum forming noun

A method or process of shaping thermoplastic by applying suction to it when warmed and placed over a mould

vacuum gauge noun

A gauge used to measure pressures lower than atmospheric pressure

vacˈuum-packed adjective

Sealed in a container from which most of the air has been removed

vacuum printing frame noun

A frame from which air can be exhausted to ensure close contact between the film image and plate

vacuum pump noun

A general term for apparatus which displaces gas against a pressure

vacuum tube noun

A sealed glass tube in which a vacuum has been made, eg a thermionic valve

ultra-high vacuum

A very close approach to complete vacuum, important for certain work of scientists and technologists

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更新时间:2024/12/23 10:20:09