mammillary
adjective
1. Resembling a breast or nipple in shape or form.
2. Pertaining to the nipples.
noun
1. (geology, speleology) A carbonate coating formed through the precipitation of calcium carbonate onto existing rock below the water surface in cave pools.
2. (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.