Mole
<B>1.</B> In dermatology, a pigmented spot on the skin, Also called a nevus.
<B>2.</B> In gynecology, a mass within the uterus formed of partly developed products of conception.<BR><B>3.</B> In biochemistry, the molecular weight of a substance.
In more technical terms, a mole is the number of atoms in exactly 12 g of carbon-12. Mole in this sense is short for molecular weight.