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词汇 alga
释义

Definition of alga in English:

alga

nounPlural algae ˈalɡəˈælɡə
  • A simple, non-flowering, and typically aquatic plant of a large group that includes the seaweeds and many single-celled forms. Algae contain chlorophyll but lack true stems, roots, leaves, and vascular tissue.

    藻类,海藻

    Divisions Chlorophyta (green algae), Heterokontophyta (brown algae), and Rhodophyta (red algae); some (or all) are frequently placed in the kingdom Protista

    Example sentencesExamples
    • The classical examples of symbiosis are the lichens, in which a fungus is associated with an alga or a cyanobacterium.
    • It is a blue-green alga, a primitive plant of the same class as seaweeds or the green slime seen on rocks and jetties when uncovered by the sea at low tide.
    • Most of the lichen is composed of fungal filaments, but living among the filaments are algal cells, usually from a green alga or a cyanobacterium.
    • The phenomenon was first described in a red alga and a green alga more than 30 years ago.
    • That is, a simple alga like Volvox and a complex metazoan like an octopus both occupy the same sublevel.

Derivatives

  • algal

  • adjective ˈalɡəlˈælɡ(ə)l
    • Relating to or characteristic of algae.

      opaque covers were placed over the containers to limit algal growth
      Example sentencesExamples
      • The diet of Daphnia was supplemented with an algal suspension of Chlorella SP.
      • Photosynthesis and primary production were the monopoly of bacteria and algal protists that populated the world's shallow seas.
      • After their split from the green algae, a red algal cell was engulfed by a nonphotosynthetic protist and reduced to a plastid.

Origin

Mid 16th century: from Latin, 'seaweed'.

Rhymes

realgar, Trafalgar

Definition of alga in US English:

alga

nounˈælɡəˈalɡə
  • A simple, nonflowering, and typically aquatic plant of a large group that includes the seaweeds and many single-celled forms. Algae contain chlorophyll but lack true stems, roots, leaves, and vascular tissue.

    藻类,海藻

    Divisions Chlorophyta (green algae), Heterokontophyta (brown algae), and Rhodophyta (red algae); some (or all) are frequently placed in the kingdom Protista. See also blue-green algae

    Example sentencesExamples
    • The classical examples of symbiosis are the lichens, in which a fungus is associated with an alga or a cyanobacterium.
    • The phenomenon was first described in a red alga and a green alga more than 30 years ago.
    • Most of the lichen is composed of fungal filaments, but living among the filaments are algal cells, usually from a green alga or a cyanobacterium.
    • That is, a simple alga like Volvox and a complex metazoan like an octopus both occupy the same sublevel.
    • It is a blue-green alga, a primitive plant of the same class as seaweeds or the green slime seen on rocks and jetties when uncovered by the sea at low tide.

Origin

Mid 16th century: from Latin, ‘seaweed’.

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