mole
//moʊl//
Noun
A small burrowing mammal with dark velvety fur, a long muzzle, and very small eyes, that feeds mainly on worms and insects.
A mole dug a tunnel through our garden.
Synonym
Noun
A small, often dark, permanent spot or blemish on the skin.
She has a small mole on her cheek.
Synonym
Noun
A person within an organization who secretly passes confidential information to another organization or country; a spy.
The police discovered a mole in their department who had been leaking information to criminals.
Synonym
Noun
The SI unit of amount of substance, equal to the quantity containing as many elementary entities as there are atoms in 12 grams of carbon-12.
One mole of any substance contains approximately 6.02 × 10²³ particles.
Noun
A large solid structure serving as a pier, breakwater, or causeway.
The fishing boats were safely moored behind the mole.