(botany) an isolated thickening of tissue, especially a stiff protuberance on the lip of an orchid | a dark golden-brown or reddish-brown horse |
bony tissue formed during the healing of a fractured bone | a small horny callus on the inner surface of a horse's leg |
an area of skin that is thick or hard from continual pressure or friction (as the sole of the foot) | the brown color of chestnuts |
| edible nut of any of various chestnut trees of the genus Castanea |
| any of several attractive deciduous trees yellow-brown in autumn; yield a hard wood and edible nuts in a prickly bur |
| wood of any of various chestnut trees of the genus Castanea |