Definition of "mammillary" [mam•mil•la•ry]

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

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• "The nuclei called mammillary bodies are involved in olfactory reflexes and emotional response to odours"
• "What’s especially interesting is that right next to the hypothalamus, where the feeding and satiety chemicals NPY and CART are produced, is a part of the brain called the mammillary body because it looks like a pair of breasts."
• "Their mammillary bodies -- globe-like structures in the brain which play a role in long-term memory -- get smaller."