vacuum

名词 n. 动词 v.
中文释义

英文释义

名词 n.
  1. A region of space that contains no matter.
    — The Wards are open-topped, with skyscrapers rising from the superstructure. Towers are sealed against vacuum, as the breathable atmosphere envelope is only maintained to a height of about seven meters. The atmosphere is contained by the centrifugal force of rotation and a "membrane" of dense, colorless sulphur hexafluoride gas, held in place by carefully managed mass effect fields.
  2. 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
  3. Ellipsis of vacuum cleaner. abbreviation,alt-of,colloquial,ellipsis
  4. A spacetime having tensors of zero magnitude.
  5. A ground state of a quantum field or of local spacetime, or more abstractly the lowest-energy state of a system.
  6. A ground state of a quantum field or of local spacetime, or more abstractly the lowest-energy state of a system.; A description of spacetime resulting from a particular compactification of spatial dimensions.
  7. An emptiness in life created by a loss of a person who was close, or of an occupation.
    — Henrietta soon found a terrible vacuum left, by the letters in which she used to pour forth every feeling and thought to her uncle.
  8. An exercise in which one draws their abdomen towards the spine.
    — Abs show up in a most-muscular shot, a vacuum shot, the hands-behind-head compulsory ab shot, twisting poses, and so on.
动词 v.
  1. To clean (something) with a vacuum cleaner. transitive
    — “Who in the world cleans an attic? That's like vacuuming a shed.”
  2. To use a vacuum cleaner. intransitive
  3. To optimise a database or database table by physically removing deleted tuples. transitive
    — But the advantage of an auto-vacuumed database is that when B-tree pages are no longer needed, they are moved to the end of the database file and then the database file is truncated, thus returning the unused pages back to the filesystem.

词形变化

vacuums plural vacua error-unknown-tag,formal,plural,rare vacuüm alternative,rare vacuums present,singular,third-person vacuuming participle,present vacuumed participle,past vacuumed past vacuüm alternative,rare

词汇关系

近义词
vacuum state
衍生词
abdominal vacuum bee vacuum central vacuum double Kerr vacuum electrovacuum false vacuum high vacuum in a vacuum intervacuum Kerns-Wild vacuum Kerr vacuum Khan-Penrose vacuum legal vacuum nature abhors a vacuum nonvacuum Oszváth-Schücking vacuum partial vacuum political vacuum power vacuum quasivacuum rough vacuum Schwarzschild vacuum stomach vacuum Taub-NUT vacuum thermal-vacuum Torricellian vacuum ultravacuum vacuumable vacuum activity vacuum airship vacuum aspiration vacuum bag vacuum balloon vacuum bed vacuum bomb vacuum bottle vacuum brake vacuum bubble vacuum catastrophe vacuum chamber vacuum-clean vacuum-cleaned vacuum cleaner vacuum decay vacuum desiccator vacuum distillation vacuum energy vacuumer vacuum exercise vacuum flask vacuum fluorescent display vacuum gauge vacuumless vacuumlike vacuumous vacuum pack vacuum-pack vacuum-packed vacuum pan vacuum pose vacuum pump vacuum sealer vacuum tube vacuum up vacuum valve vacuum workout
相关词
vacant vacuous

词源

词源 1
Borrowed from New Latin vacuum (“vacuum”), a subsense of Classical Latin vacuum (“empty space”), a substantivised form of vacuus (“empty”); related to vacāre (“to be empty”).
The exercise sense comes from analogy to the sucking action of a vacuum cleaner.
词源 2
Borrowed from New Latin vacuum (“vacuum”), a subsense of Classical Latin vacuum (“empty space”), a substantivised form of vacuus (“empty”); related to vacāre (“to be empty”).
The exercise sense comes from analogy to the sucking action of a vacuum cleaner.
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