callus
The word callus denotes
- in medicine a coarse, more or less extensive scar , especially the callus ;
- in the plant genus Ampfer (Rumex), nodular-hard, cartilage-like thickenings on the inner tepals, the valves ;
- In the orchid genus Oncidium, the bulbous elevation of the base of the flower lip;
- in male amphibians, especially many frogs, a horny thickening that occurs during spawning time, especially on the inside of the fingers, see estrous callosity .