1. (n.) A small knoblike prominence or excrescence, whether natural or morbid; as, a tubercle on a plant; a tubercle on a bone; the tubercles appearing on the body in leprosy.

2. (n.) A small mass or aggregation of morbid matter; especially, the deposit which accompanies scrofula or phthisis. This is composed of a hard, grayish, or yellowish, translucent or opaque matter, which gradually softens, and excites suppuration in its vicinity. It is most frequently found in the lungs, causing consumption.

abscess aposteme bed sore bilge blain bleb blister blob boil boss bow bubble bubo bulb bulbil bulge bulla bump bunch bunion burl button cahot canker canker sore carbuncle chancre chancroid chilblain chine clump cold sore condyle convex corm dowel ear eschar felon fester festering fever blister fistula flange flap furuncle furunculus gall gathering gnarl gumboil handle hemorrhoids hill hump hunch jog joggle kibe knob knot knur knurl lesion lip loop lump mole mountain nevus nub nubbin nubble papilloma papula papule paronychia parulis peg petechia piles pimple pock polyp pustule radicle radix rhizome rib ridge ring rising root rootstock scab shoulder soft chancre sore spine stigma stud sty style suppuration swelling tab tap taproot tuber tubercule ulcer ulceration verruca vesicle wale wart welt wheal whelk whitlow wound