藻类,海藻
Alga \Al"ga\, n.; pl. {Alg[ae]}. [L., seaweed.] (Bot.) A kind of seaweed; pl. the class of cellular cryptogamic plants which includes the black, red, and green seaweeds, as kelp, dulse, sea lettuce, also marine and fresh water conferv[ae], etc.
alga n : primitive chlorophyll-containing mainly aquatic eukaryotic organisms lacking true stems and roots and leaves [syn: {algae}]