Lewis Short
concinnÄtas (noun F) : concinnus
* A neat, elegant, or skilful joining of several things (in good prose, but rare).
* In gen.: concinnitates colorum,Gell. 2, 26, 4: non est ornamentum virile concinnitas,a too carefully arranged dress,Sen. Ep. 115, 3: vitare concinnitatem,Suet. Aug. 86.
* Esp., in rhet., beauty of style, produced by a skilful connection of words and clauses, Cic. Or. 44, 149; 49, 164 sq.; id. Brut. 83, 287; 95, 325 (not in Quint.).
Charlton T. Lewis, Charles Short, A Latin Dictionary