gram atom: Meaning and Definition of

gram' at"om

Pronunciation: (gram'u-tom'ik, -tom"-). [key]
— Chem. Chem.
  1. the quantity of an element whose weight in grams is numerically equal to the atomic weight of the element. Also calledCf. Avogadro's number.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.