mammilla

A nipple or teat.

A nipple-shaped protuberance.

The nipple of the mammary gland.

Some nipple-like or mammillary structure.

In entomology, a small conical process or appendage on a surface; a mammula.

[capitalized] In conchology, a genus of gastropods.

In botany, applied specifically

to tubercles on a plant-surface, as in Mamillaria

to the apex of the nucleus of an ovule

to granular prominences on some pollen-grains.