Emily Dickinson Lexicon

MAM'MIL-LA-RY, a. [L. mamilla.]

1. Pertaining to the paps; resembling a pap; an epithet applied to two small protuberances, like nipples, found under the fore ventricles of the brain, and to a process of the temporal bone.
2. In mineralogy, applied to minerals composed of convex concretions.