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单词 angiosperm
释义

Definition of angiosperm in English:

angiosperm

nounˈandʒɪə(ʊ)spəːmˈanjēəˌspərm
Botany
  • A plant of a large group that comprises those that have flowers and produce seeds enclosed within a carpel, including herbaceous plants, shrubs, grasses, and most trees.

    Subdivision Angiospermae, division Spermatophyta

    Compare with gymnosperm
    Example sentencesExamples
    • Were the first angiosperms woody trees and shrubs, or were they small herbs?
    • Simple trichomes are present on aerial surfaces of most angiosperms and on some gymnosperms and bryophytes.
    • These data suggest that the enzyme is well conserved in plants and could play similar physiological roles in angiosperms and gymnosperms.
    • A great variation in endosperm size is observed within angiosperms.
    • Like other seed plants, angiosperms are heterosporangiate, producing pollen and ovules in different organs.

Derivatives

  • angiospermous

  • adjectiveandʒɪə(ʊ)ˈspəːməs
    Botany
    • Amber is the hardened resin of coniferous and angiospermous trees.
      Example sentencesExamples
      • Seed plants are also divided by gymnospermous plants and angiospermous plants.
      • His contention was that angiospermous remains could not have occurred earlier than the Tertiary.
      • Five angiospermous fossil woods of Late Tertiary have been excavated from Xinzhow County, Hubei Province.
      • At present the only safe conclusions are those concerning the climate and the predominantly angiospermous nature of the flora.
 
 

Definition of angiosperm in US English:

angiosperm

nounˈanjēəˌspərm
Botany
  • A plant that has flowers and produces seeds enclosed within a carpel. The angiosperms are a large group and include herbaceous plants, shrubs, grasses, and most trees.

    Subdivision Angiospermae, division Spermatophyta

    Compare with gymnosperm
    Example sentencesExamples
    • A great variation in endosperm size is observed within angiosperms.
    • Like other seed plants, angiosperms are heterosporangiate, producing pollen and ovules in different organs.
    • These data suggest that the enzyme is well conserved in plants and could play similar physiological roles in angiosperms and gymnosperms.
    • Simple trichomes are present on aerial surfaces of most angiosperms and on some gymnosperms and bryophytes.
    • Were the first angiosperms woody trees and shrubs, or were they small herbs?
 
 
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更新时间:2024/12/23 13:59:01