Definition of alga in English:
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
- 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.
mid 16th century: from Latin, 'seaweed'.
- 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.
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