Dictionary.com
Thesaurus.com

anhedral

American  
[an-hee-druhl] / ænˈhi drəl /

adjective

Petrography.
  1. xenomorphic.


anhedral British  
/ ænˈhiːdrəl /

noun

  1. the downward inclination of an aircraft wing in relation to the lateral axis Compare dihedral

"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 anhedral

First recorded in 1895–1900; an- 1 + -hedral