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单词 propagation
释义

WordReference Random House Unabridged Dictionary of American English © 2024
prop•a•ga•tion  (prop′ə gāshən),USA pronunciation n. 
  1. Developmental Biology, Geneticsthe act of propagating.
  2. the fact of being propagated.
  3. Developmental Biology, Geneticsmultiplication by natural reproduction.
  4. transmission or dissemination.
  • Latin propāgātiōn- (stem of propāgātiō). See propagate, -ion
  • late Middle English propagacyon 1400–50
prop′a•gation•al, adj. 
    • 4.See corresponding entry in Unabridged spreading, dispersion, diffusion.

WordReference Random House Learner's Dictionary of American English © 2024
prop•a•gate /ˈprɑpəˌgeɪt/USA pronunciation   v., -gat•ed, -gat•ing. 
  1. Developmental Biology, Geneticsto (cause to) multiply or increase by any process of natural reproduction from the parent stock: [+ object]to propagate seeds; These flowers will propagate themselves.[no object]The insects propagated vigorously.
  2. [+ object] to spread (a report, doctrine, practice, etc.) from person to person; disseminate.
prop•a•ga•tion /ˌprɑpəˈgeɪʃən/USA pronunciation  n. [uncountable]

WordReference Random House Unabridged Dictionary of American English © 2024
prop•a•gate  (propə gāt′),USA pronunciation v., -gat•ed, -gat•ing. 
v.t. 
  1. Developmental Biology, Geneticsto cause (an organism) to multiply by any process of natural reproduction from the parent stock.
  2. Developmental Biology, Geneticsto reproduce (itself, its kind, etc.), as an organism does.
  3. Developmental Biology, Geneticsto transmit (hereditary features or elements) to, or through, offspring.
  4. to spread (a report, doctrine, practice, etc.) from person to person; disseminate.
  5. to cause to increase in number or amount.
  6. Mechanicsto create (an effect) at a distance, as by electromagnetic waves, compression waves, etc., traveling through space or a physical medium;
    transmit:to propagate sound.

v.i. 
  1. Developmental Biology, Geneticsto multiply by any process of natural reproduction, as organisms;
    breed.
  2. to increase in extent, as a structural flaw:The crack will propagate only to this joint.
  3. (of electromagnetic waves, compression waves, etc.) to travel through space or a physical medium.
  • Latin propāgātus (past participle of propāgāre to reproduce (a plant) by cuttings, spread for sprouting, propagate, enlarge), equivalent. to propāg(ēs) something set out, scion, slip (pro- pro-1 + pāg-, base of pangere to fasten + -ēs noun, nominal suffix) + -ātus -ate1
  • 1560–70
propa•ga′tive, prop•a•ga•to•ry  (propə gə tôr′ē, -tōr′ē),USA pronunciation adj.  propa•ga′tor, n. 

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