1. a salt or ester of phosphoric acid, containing the chemical group PO4
Usage: chemistry
2. a fertilizer containing phosphorus compounds
Usage: agriculture
3. a carbonated soft drink flavored with fruit syrup
Usage: informal; regional

Examples

• The soil test showed low phosphate levels.
• Farmers apply phosphate fertilizer to improve crop yields.
• Calcium phosphate is an important component of bones and teeth.
• The old soda fountain served cherry phosphates.
• Detergents containing phosphates can harm aquatic ecosystems.
• The lab analyzed the water sample for phosphate contamination.
• Rock phosphate is mined for use in agriculture.