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单词 evolutional
释义

WordReference Random House Learner's Dictionary of American English © 2024
ev•o•lu•tion /ˌɛvəˈluʃən; esp. Brit. ˌivə-/USA pronunciation   n. [uncountable]
  1. any process of formation or growth;
    development: the evolution of the drama.
  2. BiologyBiol.
    • change in a population of living things by such processes as mutation and natural selection.
    • the theory that all existing organisms developed from earlier forms by natural selection.
ev•o•lu•tion•ar•y, adj. 

WordReference Random House Unabridged Dictionary of American English © 2024
ev•o•lu•tion  (ev′ə lo̅o̅shən or, esp. Brit., ē′və-),USA pronunciation n. 
  1. any process of formation or growth;
    development:the evolution of a language; the evolution of the airplane.
  2. a product of such development;
    something evolved:The exploration of space is the evolution of decades of research.
  3. Biologychange in the gene pool of a population from generation to generation by such processes as mutation, natural selection, and genetic drift.
  4. Sociologya process of gradual, peaceful, progressive change or development, as in social or economic structure or institutions.
  5. a motion incomplete in itself, but combining with coordinated motions to produce a single action, as in a machine.
  6. a pattern formed by or as if by a series of movements:the evolutions of a figure skater.
  7. Thermodynamicsan evolving or giving off of gas, heat, etc.
  8. Mathematicsthe extraction of a root from a quantity. Cf. involution (def. 8).
  9. Militarya movement or one of a series of movements of troops, ships, etc., as for disposition in order of battle or in line on parade.
  10. Militaryany similar movement, esp. in close order drill.
  • Latin ēvolūtiōn- (stem of ēvolūtiō) an unrolling, opening, equivalent. to ēvolūt(us) (see evolute) + -iōn- -ion
  • 1615–25
ev′o•lution•al, adj. 
ev′o•lution•al•ly, adv. 
    • 1.See corresponding entry in Unabridged unfolding, change, progression, metamorphosis.
    • 1.See corresponding entry in Unabridged stasis, inactivity, changelessness.

Collins Concise English Dictionary © HarperCollins Publishers::
evolution /ˌiːvəˈluːʃən/ n
  1. a gradual change in the characteristics of a population of animals or plants over successive generations: accounts for the origin of existing species from ancestors unlike them
  2. a gradual development, esp to a more complex form: the evolution of modern art
  3. the act of throwing off, as heat, gas, vapour, etc
  4. a pattern formed by a series of movements or something similar
  5. an algebraic operation in which the root of a number, expression, etc, is extracted
  6. an exercise carried out in accordance with a set procedure or plan
Etymology: 17th Century: from Latin ēvolūtiō an unrolling, from ēvolvere to evolve

ˌevoˈlutionary, ˌevoˈlutional adj
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