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sexivalent

American  
[sek-suh-vey-luhnt] / ˌsɛk səˈveɪ lənt /
Or sexavalent

adjective

Chemistry.
  1. hexavalent.


sexivalent British  
/ ˌsɛksɪˈveɪlənt /

adjective

  1. chem another word for hexavalent

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of sexivalent

First recorded in 1870–75; sexi- + -valent