phosphate

noun

1. 1. a salt of phosphoric acid containing the trivalent, negative radical PO
   2. an uncharged ester of this acid
2. any substance containing phosphates, used as a fertilizer
3. ☆ a soft drink made with soda water, syrup, and, orig., a few drops of phosphoric acid

Origin: Fr < (acide) phosphorique < -ate, -ate