the relation between things (or parts of things) with respect to their comparative quantity, magnitude, or degree | the property of a more than adequate quantity or supply |
the relative magnitudes of two quantities (usually expressed as a quotient) | (chemistry) the ratio of the total mass of an element in the earth's crust to the total mass of the earth's crust; expressed as a percentage or in parts per million |
| (physics) the ratio of the number of atoms of a specific isotope of an element to the total number of isotopes present |