Dictionary.com
Thesaurus.com

sphenic

American  
[sfee-nik] / ˈsfi nɪk /

adjective

  1. being in the shape of a wedge; wedge-shaped


sphenic British  
/ ˈsfiːnɪk /

adjective

  1. having the shape of a wedge

"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 sphenic

sphen- + -ic