a·gar (āgär′, ägär′) also a·gar-a·gar (ā′gär-āgär′, ä′gär-ä-)
1. A gelatinous material derived from certain marine algae. It is used as a base for bacterial culture media and as a stabilizer and thickener in many food products.
2. A culture medium containing this material.
[Short for Malay agar-agar.]
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