A nipple-shaped process, a, is seen to be attached by a pedicle to the back of the upper part, b, of the prostate, and to act like a stopper to the neck of the bladder.    From Wordnik.com.  [Surgical Anatomy] Reference

The prostate, d, is considerably enlarged, and the vesical orifice is girt by a prominent ring, b b, from the right border of which the nipple-shaped body, a, projects and occupies the outlet.    From Wordnik.com.  [Surgical Anatomy] Reference

"Mavis," he had said bitterly, "a song thrush, how inaptly named - a corn-crake of a woman - a mastodon of a female - an extinct mammalian creature with nipple-shaped prominences on her molar teeth.".    From Wordnik.com.  [The Fifth Rapunzel]

Small, nipple-shaped prominences found on the tongue, the skin, etc. PARAPLEGIA.    From Wordnik.com.  [The People's Common Sense Medical Adviser in Plain English or, Medicine Simplified, 54th ed., One Million, Six Hundred and Fifty Thousand] Reference

Caps may be carried very conveniently by means of a ring, with two dozen nipple-shaped beads, made of some metal, strung upon it; each bead being intended to be covered by a percussion-cap.    From Wordnik.com.  [The Art of Travel Shifts and Contrivances Available in Wild Countries] Reference

A nipple-shaped excrescence at the vesical orifice.    From Wordnik.com.  [Surgical Anatomy] Reference