(chemistry) any theory in which all matter is composed of tiny discrete finite indivisible indestructible particles; "the ancient Greek philosophers Democritus and Epicurus held atomic theories of the universe"
(psychology) a theory that reduces all mental phenomena to simple elements (sensations and feelings) that form complex ideas by association
sanctioned by or consistent with or operating under a constitution; "the constitutional right of free speech"; "constitutional government"; "constitutional guarantees"
of benefit to or intended to benefit your physical makeup; "constitutional walk"
of or relating to a constitution; "constitutional amendments"