from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Trivalent.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. trivalent

from The Century Dictionary and Cyclopedia

  • In chem., having combining power equivalent to that of three univalent or monad atoms of hydrogen. Nitrogen is tervalent in ammonia (NH3). Also, but less correctly, trivalent.


Sorry, no etymologies found.


  • In this work he formulated the idea that, in the numerous compounds of tervalent nitrogen, the three valence bonds of the nitrogen atom are directed towards the three corners of a tetrahedron, the fourth corner of this being occupied by the nitrogen atom.

    Alfred Werner - Biography


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