Dictionary Check: mole

the molecular weight of a substance expressed in grams; the basic unit of amount of substance adopted under the Systeme International d'Unites

spicy sauce often containing chocolate

a spy who works against enemy espionage

a small congenital pigmented spot on the skin

a protective structure of stone or concrete; extends from shore into the water to prevent a beach from washing away

small velvety-furred burrowing mammal having small eyes and fossorial forefeet