This meaning refers to a plant-derived polysaccharide that forms a firm gel when cooled.
Agar is extracted from certain types of seaweed.
The dessert was set with agar instead of gelatin.
In microbiology, agar is a firm gel that supports the growth and study of bacteria, fungi, and other microorganisms.
The bacteria grew on an agar plate.
Scientists added nutrients to the agar.
