Tremella, trē-mel′a, n. a genus of fungi, of the division Hymenomycetes, soft and gelatinous, mostly growing on decaying wood—Witches' Meat, Fairy Butter.—adjs.

The same thing is true of Tremella; but this name is now otherwise applied, as are all the other generic names down to Ceratium, Alb.

This phenomenon usually takes place below the level of the fertile cells, at a certain depth in the mucous tissue of the Tremella.