Emily Dickinson Lexicon

TEAT, or TIT, n. [Sax. tit, titt, as it is usually pronounced to this day; G. zitze; D. tet; W. têth; Corn. titi; Ir. did; Basque, titia; Gaelic, did; Fr. teton, breast, It. tetta; Port. and Sp. teta; Gr. τιτθος. It coincides with tooth, teeth, in elements, and radical sense, which is a shoot.]

The projecting part of the female breast; the dug of a beast; the pap of a woman; the nipple. It consists of an elastic erectile substance, embracing the lactiferous ducts, which terminate on its surface, and thus serves to convey milk to the young of animals.