any of various small insectivorous mammals, esp. of the family Talpidae, living chiefly underground, and having velvety fur, very small eyes, and strong forefeet.

a spy who becomes part of and works from within the ranks of an enemy governmental staff or intelligence agency. Compare double agent .

Machinery . a large, powerful machine for boring through earth or rock, used in the construction of tunnels.

noun

beauty mark , beauty spot , birthmark , blot , freckle , nevus , strawberry mark , agent , double agent , infiltrator , informer , inside man/woman , secret agent , fault , growth , mark