wart

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A hard rough lump growing on the skin, caused by infection with certain viruses and occurring typically on the hands or feet.
2. n. A similar growth or protuberance, as on a plant.
3. n. A genital wart.
4. n. One that resembles or is likened to a wart, especially in unattractiveness or smallness.
5. n. An imperfection; a flaw.
6. idiom. warts and all Slang All defects and imperfections notwithstanding: They love each other, warts and all.

Century Dictionary and Cyclopedia

1. n. A small circumscribed elevation on the skin, usually with an uneven papillary surface and a broad base, caused by a localized overgrowth of the papillæ and epidermis; verruca; hence, a similar natural excrescence of the skin. Any part of the skin of mammals, parts about the head and beak of birds, the skins of various reptiles, batrachians, fishes, and numberless invertebrates, may be studded with such formations, to which the name wart commonly and not improperly applies. The toad is a good example.
2. n. In farriery, a spongy excrescence on the pastern of the horse.
3. n. In botany, a firm glan dular or gland-like excrescence on the surface of a plant.
4. n. In entomology, a small obtuse, rounded, or flattened elevation of a surface, often of a distinct color from the rest of the part: used principally in describing larvæ.

Wiktionary

1. n. A type of deformed growth occurring on the skin caused by the human papillomavirus (HPV).

GNU Webster's 1913

1. n. A small, usually hard, tumor on the skin formed by enlargement of its vascular papillæ, and thickening of the epidermis which covers them.
2. n. An excrescence or protuberance more or less resembling a true wart; specifically (Bot.), a glandular excrescence or hardened protuberance on plants.

WordNet 3.0

1. n. an imperfection in someone or something that is suggestive of a wart (especially in smallness or unattractiveness)
2. n. any small rounded protuberance (as on certain plants or animals)
3. n. (pathology) a firm abnormal elevated blemish on the skin; caused by a virus