acceleration

== English == === Alternative forms === acc. a. === Etymology === First attested in 1531. From French accélération or more likely directly from Latin accelerātiō (“a hastening, acceleration”). Equivalent to accelerate +‎ -ion. === Pronunciation === enPR: əksĕlərā'shən, IPA(key): /əkˌsɛl.əˈɹeɪ.ʃən/, /ækˌsɛl.əˈɹeɪ.ʃən/, /ɪkˌsɛl.əˈɹeɪ.ʃən/ Rhymes: -eɪʃən Hyphenation: ac‧ce‧le‧ra‧tion === Noun === acceleration (countable and uncountable, plural accelerations) (uncountable) The act of accelerating, or the state of being accelerated; increase of motion or action; as opposed to retardation or deceleration. (countable) The amount by which a speed or velocity increases (and so a scalar quantity or a vector quantity). (physics) The change of velocity with respect to time (can include deceleration or changing direction). The advancement of students at a rate that places them ahead of where they would be in the regular school curriculum. ==== Usage notes ==== Acceleration in SI units is measured in metres per second per second (m/s2), or in imperial units in feet per second per second (ft/s2). ==== Antonyms ==== (antonym(s) of “act or state, amount”): deceleration, retardation ==== Derived terms ==== ==== Translations ==== === See also === displacement velocity jerk === References === == Danish == === Noun === acceleration c (singular definite accelerationen, plural indefinite accelerationer) acceleration ==== Declension ==== === Further reading === “acceleration” in Den Danske Ordbog == Interlingua == === Noun === acceleration (plural accelerationes) acceleration == Swedish == === Etymology === accelerera +‎ -tion === Noun === acceleration c acceleration (increase or increasing of speed, of something concrete or abstract) (physics) acceleration ==== Declension ==== ==== Related terms ==== accelerator accelerera === References === “acceleration”, in Svensk ordbok [Dictionary of Swedish] (in Swedish) “acceleration”, in Svenska Akademiens ordbok [Dictionary of the Swedish Academy] (in Swedish)