abundance

Noun

• (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

• the property of a more than adequate quantity or supply
  • an age of abundance
    

Related words

• Synonyms: 
  copiousness , teemingness
• Antonyms: 
  scarcity , scarceness