(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 ...

(usually transitive, nuclear physics) To blend highly-enriched uranium, typically from decommissioned nuclear weapons, with uranium containing a low concentration of fissile uranium-235 (slightly-e...

In an unfelicitous manner; unhappily, unfortunately.

(countable, slang, vulgar) A weak person. / (uncountable, slang, vulgar) erectile dysfunction / (countable, slang, vulgar) A penis affected by erectile dysfunction.