(mathematics, geometry, group theory) Any of a class of groups whose finite cases are precisely the finite reflection groups (including the symmetry groups of polytopes), but which are more varied ...

(chemistry) the univalent radical -N=C=O (tautomeric with cyanate), and any of its hydrocarbyl derivatives R-N=C=O

(chiefly dialectal) Being from without; strange; foreign; peculiar.

A Nilotic language of Kenya and Tanzania.