Dictionary.com
Thesaurus.com

vermi-

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

    vermifuge.


vermi- British  

combining form

  1. worm

    vermicide

    vermiform

    vermifuge

"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 vermi-

Combining form of Latin vermis worm