callus
/ˈkæləs/(亦作callous)
noun
1- a thickened and hardened part of the skin or soft tissue, especially in an area that has been subjected to friction胼胝, 老茧。
1.1
- Medicine the bony healing tissue which forms around the ends of broken bone【医】骨痂。
1.2
- Botany a hard formation of tissue, especially new tissue formed over a wound【植】愈伤组织; 胼胝体。
词源
mid 16th cent.: from Latin callus （more commonly callum） 'hardened skin'.