abundant source

Iron pyrites (FeS2) is the most abundant source of this element.

The only abundant source of carbonic acid in the soil, is decaying vegetable matter.

After the Revolution, the war with France made it necessary to have recourse annually to this abundant source of revenue.

Egg yolk is the most abundant source of phosphorized fat in food material, but milk likewise furnishes an appreciable amount.

Old Brotteaux was a sceptic and found in his atheism an abundant source of self-satisfaction.