{ E‐ryth″rin, E‐ryth″rine (?) }, n. [Gr. ερυθρὄσ red.] 1. (Chem.) A colorless crystalline substance, C20H22O10, extracted from certain lichens, as the various species of Rocella. It is a derivative of orsellinic acid. So called because of certain red compounds derived from it. Called also erythric acid.
2. (Min.) See Erythrite, 2.