A poisonous and hallucinogenic mushroom, Amanita muscaria, with a large crimson cap, fading to yellow, scattered with white flecks.

A light, chalky deposit of calcium carbonate formed in caverns or fissures of limestone.

A culture medium designed to grow gram-negative bacteria and differentiate them for lactose fermentation.

plural of MacConkey agar

(Singapore) Alternative spelling of agaration

A mixture of agar with peptone, yeast extract, bile salts and crystal violet; it is used for enumerating coliform bacteria in dairy products