Wart n. : A small, usually hard, tumor on the skin formed by enlargement of its vascular papillae, and thickening of the epidermis which covers them.

Wart n. : An excrescence or protuberance more or less resembling a true wart; specifically (Bot.), a glandular excrescence or hardened protuberance on plants.

Example:
How can you tell between a Wart and a skin tag?

Taxonomy
wart, treatments, salicylic acid, duct tape, cancers, plantar warts, HPV, skin, HPV types, human papillomavirus, wart treatments, Duct tape occlusion therapy, product, drug, laser treatment, CO2 lasers, anogenital warts, free encyclopedia.

Defination from the web:
wart (also known as verruca) is generally a small, rough tumor, typically on hands and feet but often other locations, that can resemble a cauliflower or a solid blister. ... Dinitrochlorobenzene (DNCB), like salicylic acid, this is applied directly to the wart. ...