CHUB. The _Leuciscus cephalus_, a fresh-water fish. CHUCK. A sea-shell. Nickname for a boatswain, "Old chucks." Also, an old word signifying large chips of wood. CHUCKLE-HEADED. Clownishly stupid; lubberly. CHULLERS. A northern name for the gills of a fish. CHUNAM. Lime made of burned shells, and much used in India for the naval store-houses. That made at Madras is of peculiarly fine quality, and easily takes a polish like white marble. CHUNK. A coarse slice of meat or bread; more properly _junk_. Also, the negro term for lumps of firewood. CHUNTOCK. A powerful dignitary among the Chinese. (_See_ JANTOOK.) CHURCH. The part of the ship arranged on Sunday for divine service. CHURCH-WARDEN. A name given on the coast of Sussex to the shag or cormorant. Why, deponent sayeth not. CHUTE. A fall of water or rapid; the word is much used in North America, wherever the nomenclature of the country retains traces of the early French settlers. (_See_ SHOOT.) CILLS. Horizontal pieces of timber to ports or scuttles; mostly spelled _sills_ (which see). Generally pronounced by sailors _sell_, as the port-sell. CINGLE [from _cir-cingle_, a horse's belt]. A belt worn by seamen. CINQUE-PORT. A kind of fishing-net, having five entrances. CINQUE PORTS, THE. These are five highly privileged stations, the once great emporiums of British commerce and maritime greatness; they are Dover, Hastings, Sandwich, Romney, and Hythe, which, lying opposite to France, were considered of the utmost importance. To these were afterwards added Winchelsea, Rye, and Seaford. These places were honoured with peculiar immunities and privileges, on condition of their providing a certain number of ships at their own charge for forty days. Being exempted from the jurisdiction of the Admiralty court, the Lord Warden of the Cinque Ports is authorized to make rules for the government of pilots within his jurisdiction, and in many other general acts exceptions are provided to save the franchises of the Cinque Ports unimpeached. It is a singular fact that it has never been legally determined whether the Downs and adjacent roadsteads are included in the limits of the Cinque Ports. All derelicts found without the limits by Cinque Port vessels are droits of admiralty. This organization was nearly broken up in the late state reforms, but the Lord Warden still possesses some power and jurisdiction. CIPHERING. A term in carpentry. (_See_ SYPHERED.) CIRCLE. A plane figure bounded by a line called the circumference, everywhere equally distant from a point within it, called the centre. CIRCLE OF PERPETUAL APPARITION. A circle of the heavens parallel to the equator, and at a distance from the pole of any place equal to the latitude: within this circle the stars never set. CIRCLES, GREAT, LESSER, AZIMUTH, VERTICAL (which see). CIRCLES OF LONGITUDE. These are great circles passing through the poles of the ecliptic, and so cutting it at right angles.