Lewis & Short

păpilla, ae, f. dim. [papula],

  1. I. a nipple, teat, on the breast of human beings and of animals: papillae capitula mammarum dictae, quod papularum sint similes, Fest. p. 220 Müll.; Plaut. Rud. 2, 4, 10; Plin. 11, 37, 69, § 181: delphinum, id. 11, 40, 95, § 235: uberis, Col. 9, 11, 4; Plin. Ep. 3, 6, 2.
  2. II. Transf.
    1. A. Poet., the breast: nudantes rejectā veste papillas, Cat. 66, 81: hasta sub exsertam donec perlata papillam Haesit, Verg. A. 11, 803: tunc nuda papillis constitit auratis, her breasts adorned with gold chains, Juv. 6, 122.
      Of the male breast: infra laevam papillam, Suet. Oth. 11; cf. Plaut. Cas. 4, 4, 22; Ov. Am. 1, 4, 37.
    2. B. A pustule, pimple, Ser. Samm. 64, 1100; 10, 133.
    3. C. A rose-bud, Auct. Pervig. Ven. 14; 21.