holism

Concise Oxford English Dictionary © 2008 Oxford University Press:
holism /ˈhəʊlɪz(ə)m, ˈhɒl-/

▶noun

• 1 chiefly Philosophy the theory that certain wholes are greater than the sum of their parts. The opposite of atomism.

• 2 Medicine the treating of the whole person, rather than just the symptoms of a disease.

– derivatives
holist adjective & noun.

– origin 1920s: from holo- + -ism.