Lewis Short
fluctĭo (noun F) : fluo; cf. fluctus
* A flowing, flow (freq. in Plin.): fluctione occulta laborare,Plin. 31, 11, 47, § 127: oculorum,id. 27, 9, 49, § 74; 28, 7, 21, § 73: mulierum,id. 21, 19, 73, § 123: ventris,id. 23, 5, 53, § 99: fluctiones quas Graeci rheumatismos vocant,id. 22, 18, 21, § 46; 22, 25, 68, § 138.
Charlton T. Lewis, Charles Short, A Latin Dictionary