early 15c., "native or resident of Naples," literally "of Naples," from Latin Neapolitanus, from Neapolis (see Naples); it preserves in English the Greek name of the city. As an adjective from 1590s. As a type of ice cream, from 1871; originally meaning both "ice cream of three layers and flavors" and "ice cream made with eggs added to the cream before freezing." In early 18c., Neapolitan consolation meant "syphilis."
"track left by a moving ship," 1540s, perhaps from Middle Low German or Middle Dutch wake "hole in the ice," from Old Norse vök, vaka "hole in the ice," from Proto-Germanic *wakwo. The sense perhaps evolved via "track made by a vessel through ice." Perhaps the English word is directly from Scandinavian. Figurative use (such as in the wake of "following close behind") is recorded from 1806.
"sloping bank" (especially leading up to a fortification), 1670s, from French glacir "to freeze, make slippery," from Old French glacier "to slip, glide," from Vulgar Latin *glaciare "to make or turn into ice," from Latin glacies "ice" (probably from a suffixed form of PIE root *gel- "cold; to freeze").
c. 1200, so called for its ice-choked fjords. Related: Icelander; Icelandic.
apparently an early Middle English merger of three related Old English nouns, flota "boat, fleet," flote "troop, flock," flot "body of water, sea;" all from the source of float (v.). The early senses were the now-mostly-obsolete ones of the Old English words: "state of floating" (early 12c.), "swimming" (mid-13c.); "a fleet of ships; a company or troop" (c. 1300); "a stream, river" (early 14c.). From c. 1300 as an attachment for buoyancy on a fishing line or net; early 14c. as "raft." Meaning "platform on wheels used for displays in parades, etc." is from 1888, probably from earlier sense of "flat-bottomed boat" (1550s). As a type of fountain drink, by 1915.
Float.—An ade upon the top of which is floated a layer of grape juice, ginger ale, or in some cases a disher of fruit sherbet or ice cream. In the latter case it would be known as a "sherbet float" or an "ice-cream float." ["The Dispenser's Formulary: Or, Soda Water Guide," New York, 1915]
Few soda water dispensers know what is meant by a "Float Ice Cream Soda." This is not strange since the term is a coined one. By a "float ice cream soda" is meant a soda with the ice cream floating on top, thus making a most inviting appearance and impressing the customer that you are liberal with your ice cream, when you are not really giving any more than the fellow that mixes his ice cream "out of sight." [The Spatula, Boston, July, 1908]
1700, "one who ice-skates," agent noun from skate (v.). Extended to skateboarders by 1977.