Definition of mole-rat:
(n) :
Any of several small, burrowing, insectivorous mammals of the family Talpidae.
(n) :
A naevus, a pigmented, slightly raised, and sometimes hairy spot on the skin.
(n) :
(espionage) An internal spy; a person who involves themself with an enemy organisation, especially an intelligence or governmental organisation, to determine and betray its secrets from within.
(n) :
(chemistry, physics) In the International System of Units, the base unit of amount of substance; the amount of substance of a system which contains exactly 6.02214076×10²³ elementary entities (atoms, ions, molecules, etc.). Symbol: mol. The number of atoms is known as Avogadro’s number. [from 1897]
(n) :
Any of several spicy sauces typical of the cuisine of Mexico and neighboring Central America countries, especially one that contains chocolate and is used in cooking main dishes, not desserts.
(n) :
A kind of self-propelled excavator used to form underground drains, or to clear underground pipelines.