Ad·ler 
(ădlər, äd-), Felix 1851-1933.
(ădlər, äd-), Felix 1851-1933. German-born American educator and reformer who founded the Society for Ethical Culture (1876), an organization dedicated to the teaching of ethical ideals.
- sphene
- sphenic
- spheno-
- sphenodon
- sphenogram
- 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