quadrivalent

UK: /ˌkwɒdrɪˈveɪlənt/ US: (kwod′rə vā′lənt, kwo driv′ə-)

WordReference Random House Unabridged Dictionary of American English © 2026

quad•ri•va•lent  (kwod′rə vā′lənt, kwo driv′ə-), adj. [Chem.]

1. Chemistry having a valence of four;
   tetravalent.
2. Chemistry exhibiting four different valences, as antimony with valences of 5, 4, 3, and -3.

• quadri- + -valent 1860–65

quad′ri•va′lence, quad′ri•va′len•cy, n. 
quad′ri•va′lent•ly, adv. 

Collins Concise English Dictionary © HarperCollins Publishers::

quadrivalent / ˌkwɒdrɪˈveɪlənt/ adjective

1. another word for tetravalent

ˌquadriˈvalency, ˌquadriˈvalence noun