agar Agapornis • agar-agar · · · Info · Definitions · Synonyms · Characters · · agar · · Text Latin · · Script 4 · · Length 2 · · Syllables Definitions · · · (noun) any culture medium that uses agar as the gelling agent. Synonyms: nutrient agar. · · Noun Definition 1 (noun) a colloidal extract of algae; used especially in culture media and as a gelling agent in foods. Synonyms: agar-agar. · · Noun Definition 2 Synonyms · · · nutrient agar · · Synonym 1 agar-agar · · Synonym 2 Characters · · a latin small letter a U+0061 g latin small letter g U+0067 r latin small letter r U+0072