a·can·tha 
(ə-kănthə)
(ə-kănthə)n. pl. a·can·thae (-thē)
A sharp spiny part or structure, such as the spinous process of a vertebra.
[New Latin, from Greek akantha, thorn.]
- sphenoid
- sphenoidal
- sphenoid bone
- spher-
- spher-
- spheral
- sphere
- sphere of influence
- spheric
- spherical
- spherical aberration
- spherical angle
- spherical coordinate
- spherical excess
- spherical geometry
- spherically
- sphericalness
- spherical polygon
- spherical triangle
- spherical trigonometry
- sphericity
- spherics
- spherics
- spherics
- sphero-