erythrin

Webster's Dictionary (GCIDE)

2.(Min.) A rose-red mineral, crystallized and earthy, a hydrous arseniate of cobalt, known also as cobalt bloom; -- called also erythrin or erythrine. [1913 Webster]

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. [1913 Webster]

2.(Min.) See Erythrite, 2. [1913 Webster]