Definition of alga in English:

alga

noun

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

    • ‘The classical examples of symbiosis are the lichens, in which a fungus is associated with an alga or a cyanobacterium.’
    • ‘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.’
    • ‘The phenomenon was first described in a red alga and a green alga more than 30 years ago.’
    • ‘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.

Pronunciation:

alga

/ˈalɡə/