Phosphate (noun)

A salt or ester of phosphoric acid, especially one used as a fertilizer or in detergents.

Origin:

Derived from the greek word 'phosphoros' meaning 'light-bringing'.

Examples:

1. Phosphates are important nutrients for plant growth.
2. The water in the lake was contaminated with excessive amounts of phosphates from the nearby factory.
3. Phosphate rock is a major source of phosphorus, a key element in the structure of DNA and cell membranes.
4. The use of phosphates in detergents has been restricted in some countries due to environmental concerns.
5. Phosphates are also used in food preservation, as they help to prevent spoilage by bacteria.