Dictionary.com
Thesaurus.com

phytogenic

American  
[fahy-tuh-jen-ik] / ˌfaɪ təˈdʒɛn ɪk /

adjective

  1. of plant origin.


phytogenic British  
/ ˌfaɪtəʊˈdʒɛnɪk /

adjective

  1. derived from plants

    coal is a phytogenic substance

"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 phytogenic

First recorded in 1855–60; phyto- + -genic