1. metaphosphoric acid a glassy solid acid often used as a dehydrating agent
  2. orthophosphoric acid an acid used in fertilizers and soaps: H3PO4
  3. hypophosphoric acid a crystalline tetrabasic acid (H4P2O6)
  4. polyphosphoric acid a series of oxyacids of phosphorus
  5. pyrophosphoric acid a solid acid formed by reactions of orthophosphoric acid
  6. triphosphoric acid an acid that is a partial anhydride of three molecules of phosphoric acid; known chiefly in the form of its salts and esters
  7. phosphoric acid an acid used in fertilizers and soaps: H3PO4
  8. creatine phosphoric acid an organic compound of creatine and phosphoric acid
  9. orthophosphorous acid a clear or yellow monobasic acid (H3PO2)
  10. hypophosphorous acid a clear or yellow monobasic acid (H3PO2)
  11. phosphorous acid a clear or yellow monobasic acid (H3PO2)
  12. metaphysics the philosophical study of being and knowing
  13. elaeostearic acid a crystalline unsaturated fatty acid
  14. atmospheric state the weather or climate at some place
  15. metaphorically in a metaphorical manner
  16. metaphorical expressing one thing in terms normally denoting another
  17. atmospheric static a crackling or hissing noise caused by electrical interference
  18. atmospherics a crackling or hissing noise caused by electrical interference
  19. eleostearic acid a crystalline unsaturated fatty acid
  20. methacrylic acid an unsaturated acid used to make resins and plastics

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