Definition of concentrativeness in English:

concentrativeness

Pronunciation /ˈkɒns(ɛ)nˌtreɪtɪvnɪs/

noun

  • Originally and chiefly in phrenology: the organ or faculty of concentration; concentrative quality or ability.

Origin

Early 19th century; earliest use found in Royal Cornwall Gazette. From concentrative + -ness.