Agar
thickening agent used in microbiology and food From Wikipedia, the free encyclopedia
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Agar is a jelly-like substance made from red algae. It consists of agarose and a mixture of molecules known as agaropectin.
You can grow bacteria on agar plates: that is how bacteria are laid out for testing in hospital pathology departments. It is used as a place to grow bacteria in an microbiology laboratory.[1]
Domestically, it is used to make desserts, as a laxative, and in the process of brewing.
The word "agar" comes from the Malay word agar-agar, a word which is used for "red algae", where the jelly comes from.[2]
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