concinnity \kuhn-SIN-uh-tee\ noun
: Internal harmony or fitness in the adaptation of parts to a whole or to each other.
: Studied elegance of design or arrangement -- used chiefly of literary style.
: An instance of concinnity.
Denis Donoghue is a primary critic of our time, catholic in scope, unique in literary apprehension, crucially gratifying in the clear concinnity of his prose.
Concinnity comes from Latin concinnitas, "elegance; harmony of style," from concinnus, "skillfully put together; pleasing, on account of harmony and proportion." Circa 1531.