adjective: Resembling a breast or nipple in shape or form.
adjective: Pertaining to the nipples.
noun: (geology, speleology) A carbonate coating formed through the precipitation of calcium carbonate onto existing rock below the water surface in cave pools.
noun: (anatomy) A mammillary body, one of a pair of small round bodies, located on the undersurface of the brain, that form part of the limbic system.