(mathematics) The arranging of non-overlapping spheres in space

(grammar) A noun form occurring in Afroasiatic languages, when the noun does not bear a determiner – where it would use the determinate state –, nor governs a noun – where it would use the construc...

plural of antigrav

(colloquial, of a person) Having obvious bruises of the skin, typically from falling or being hit or punched.