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cet-

American  
  1. a combining form meaning “whale,” used in the formation of compound words.

    cetane.


CET British  

abbreviation

  1. Central European Time

  2. Common External Tariff

"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 cet-

Combining form representing Greek kêtos whale