Also a·gar-a·gar. Also called Chinese gelatin, Chinese isinglass,Japanese gelatin, Japanese isinglass.a gelatinlike product of certain seaweeds, used for solidifying certain culture media, as a thickening agent for ice cream and other foods, as a substitute for gelatin, in adhesives, as an emulsifier, etc.
Biology. a culture medium having an agar base.
Origin of agar
First recorded in 1885–90,agar is from the Malay word agaragar seaweed from which a gelatin is rendered, or the gelatin itself
a complex gelatinous carbohydrate obtained from seaweeds, esp those of the genus Gelidium, used as a culture medium for bacteria, a laxative, in food such as ice cream as a thickening agent (E406), etcAlso called: agar-agar