algae alga • algaecide · · · Info · Definitions · Synonyms · Characters · · algae · · Text Latin · · Script 5 · · Length Definitions · · · (noun) primitive chlorophyll-containing mainly aquatic eukaryotic organisms lacking true stems and roots and leaves. Synonyms: alga. · · Noun Definition 1 Synonyms · · · alga · · Synonym 1 Characters · · a latin small letter a U+0061 e latin small letter e U+0065 g latin small letter g U+0067 l latin small letter l U+006C