Definition of alga in English:

alga

Syllabification: al·ga
Pronunciation: /ˈalgə
 
/

noun (usually in plural algae /-jē/)

  • A simple nonflowering 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.
    • 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
    More example sentences
    • 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.
    • The phenomenon was first described in a red alga and a green alga more than 30 years ago.

Derivatives

algal

adjective
More example sentences
  • After their split from the green algae, a red algal cell was engulfed by a nonphotosynthetic protist and reduced to a plastid.
  • Photosynthesis and primary production were the monopoly of bacteria and algal protists that populated the world's shallow seas.
  • The diet of Daphnia was supplemented with an algal suspension of Chlorella SP.

Origin

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

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