The milk-secreting organ of female humans and other mammals which includes the mammary gland and the nipple or teat; a breast; an udder.
An accessory cloud like a mammary in appearance, which can form on the underside of most cloud genera.
The breastbone, consisting of the manubrium, gladiolus, and xiphoid process.
The sclerotized ventral plate of spiders, between the coxae, marking the floor of the cephalothorax.