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词汇 tomentum
释义

Definition of tomentum in English:

tomentum

nounPlural tomenta təˈmɛntəmˌtoʊˈmɛn(t)əm
Botany
  • A layer of matted woolly down on the surface of a plant.

    〔植〕绒毛

    Example sentencesExamples
    • Setae type range from being thin and highly branched, forming dense tomenta, to being broad and spatulate.
    • With its thick tomentum and indumentum and its pointed dark green leaves, with its dense growth habit, and with its pretty flowers, it is a major asset to any garden.
    • Leaves lack the thick tomentum beneath the leaf that characterizes the white linden.
    • The back of its leaves is covered with grayish-white tomenta.
    • The leaves of O. colensoi are sparingly tomentose on the upper surface of the young leaves, but the tomentum disappears before the leaves are fully developed.

Derivatives

  • tomentose

  • adjective təˈmɛntəʊs
    Botany
    • The petals are bright Indian-orange, silvery tomentose outside and glossy inside.
      Example sentencesExamples
      • They begin to form in late August and early September and are visible as white, tomentose buds at the base of the stems.
      • Each inflorescence bears numerous, small flowers with widely spreading tepals, tomentose on the outer surface, and a labellum with well-developed side lobes.
      • Both the corolla and calyx are fairly rigid and tomentose externally.
  • tomentous

  • adjective
    Botany
    • It is erect and rigid, light green in color slightly shaded reddish brown, fairly tomentous and glandular, and bearing some tiny prickles.

Origin

Late 17th century: from Latin, literally 'cushion stuffing'.

Definition of tomentum in US English:

tomentum

nounˌtōˈmen(t)əmˌtoʊˈmɛn(t)əm
Botany
  • A layer of matted woolly down on the surface of a plant.

    〔植〕绒毛

    Example sentencesExamples
    • With its thick tomentum and indumentum and its pointed dark green leaves, with its dense growth habit, and with its pretty flowers, it is a major asset to any garden.
    • Leaves lack the thick tomentum beneath the leaf that characterizes the white linden.
    • The back of its leaves is covered with grayish-white tomenta.
    • Setae type range from being thin and highly branched, forming dense tomenta, to being broad and spatulate.
    • The leaves of O. colensoi are sparingly tomentose on the upper surface of the young leaves, but the tomentum disappears before the leaves are fully developed.

Origin

Late 17th century: from Latin, literally ‘cushion stuffing’.

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