acceleration

名词 n.
中文释义
发音 əksĕlərā'shən

英文释义

名词 n.
  1. The act of accelerating, or the state of being accelerated; increase of motion or action; as opposed to retardation or deceleration. uncountable
    — A falling body moves toward the earth with an acceleration of velocity.
  2. The amount by which a speed or velocity increases (and so a scalar quantity or a vector quantity). countable
    — The boosters produce an acceleration of 20 metres per second per second.
  3. The change of velocity with respect to time (can include deceleration or changing direction). countable,uncountable
  4. The advancement of students at a rate that places them ahead of where they would be in the regular school curriculum. countable,uncountable

词形变化

accelerations plural acc. alternative a. alternative

词汇关系

反义词
deceleration retardation
衍生词
accelerational acceleration clause accelerationism accelerationist acceleration lane acceleration of freefall acceleration of gravity acceleration principle angular acceleration antiacceleration autoacceleration cardioacceleration celeration centripetal acceleration deacceleration four-acceleration hardware acceleration microacceleration nonacceleration overacceleration Planck acceleration plasma acceleration plasma wakefield acceleration postacceleration proper acceleration quadriacceleration reacceleration underacceleration
相关词
displacement velocity jerk

词源

Etymology tree
Proto-Indo-European *h₂éd
Proto-Italic *ad
Proto-Italic *ad-
Latin ad-
Proto-Indo-European *kel-der.
Latin celer
Proto-Indo-European *-h₂
Proto-Indo-European *-éh₂
Proto-Indo-European *-yéti
Proto-Indo-European *-eh₂yéti
Proto-Italic *-āō
Latin -ō
Latin celerō
Latin accelerō
Proto-Indo-European *-tis
Proto-Indo-European *-Hō
Proto-Indo-European *-tiHō
Proto-Italic *-tiō
Latin -tiō
Latin accelerātiōder.
English acceleration
First attested in 1531. From French accélération or more likely directly from Latin accelerātiō (“a hastening, acceleration”). Equivalent to accelerate + -ion.
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