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 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.
• 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.

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