Chemistry. a clear, colorless, poisonous, flammable liquid, C8H10, the ortho isomer of xylene: used chiefly in the synthesis of phthalic anhydride.

Nearby words

  1. ortho-dichlorobenzene,
  2. ortho-kung t cell,
  3. ortho-nitrophenol,
  4. ortho-novum,
  5. ortho-toluidine,
  6. orthoboric acid,
  7. orthocenter,
  8. orthocentre,
  9. orthocephalic,
  10. orthochorea

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