Meaning : The property of a more than adequate quantity or supply.
Example :
An age of abundance.
Synonyms : copiousness, teemingness
Meaning : (physics) the ratio of the number of atoms of a specific isotope of an element to the total number of isotopes present.
Meaning : (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.