κολόκυμα
κολόκῡμα, ατος, τό,
A). large heavy wave before it breaks, swell that is the forerunner of a storm: metaph., of the swelling threats of Cleon, Eq. 692 (expld. as κόλον κῦμα, Sch.ad loc.; τυφλὸν κῦμα, ; κωφὸν κῦμα, ).