noun, plural: moles
(2) The molecular weight of a substance (in grams); gram molecule.
(1) True moles: any of the various small insectivorous mammals of the family Talpidae; predominantly burrowing species, others are aquatic or semi-aquatic. Most of them have cylindrical bodies covered in fur; their eyes are generally small or covered; ears are generally not visible; strong forefeet.
(2) Other animals unrelated to true moles: such as the Golden mole (a burrowing insectivorous mammal in the family Chrysochloridae), the marsupial mole (a burrowing insectivorous marsupial mammal of the order Notoryctemorphia), and duck mole (a platypus).