caruncle

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Biology A fleshy naked outgrowth, such as a fowl's wattles.
• noun Botany An outgrowth or appendage at or near the hilum of certain seeds, as of the castor-oil plant.

from The Century Dictionary.

• noun A small fleshy excrescence, either natural or morbid. Specifically
• noun In ornithology, a fleshy excrescence on the head of a bird, as the comb or one of the wattles of a hen.
• noun In botany, a protuberance surrounding the hilum of a seed. Strictly, it is an outgrowth of the micropyle, or external orifice of the ovule.
• noun In entomology, a naked, more or less rounded, fleshy elevation of the surface, especially on the body of a caterpillar or other insect-larva.
• noun A small horny protuberance, at the tip of a young bird's beak, which serves to break the egg-shell at the time of hatching: same as egg-tooth.
• noun A peculiar leaf-like sense-organ found on the dorsal side of the segments at the anterior end of certain polychætous annelids, especially those belonging to the family Amphinomidæ.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Anat.) A small fleshy prominence or excrescence; especially the small, reddish body, the caruncula lacrymalis, in the inner angle of the eye.
• noun (Bot.) An excrescence or appendage surrounding or near the hilum of a seed.
• noun (Zoöl.) A naked, flesh appendage, on the head of a bird, as the wattles of a turkey, etc.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A small, fleshy excrescence that is a normal part of an animal's anatomy
• noun A similar excrescence near the hilum of some seeds

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun an outgrowth on a plant or animal such as a fowl's wattle or a protuberance near the hilum of certain seeds