CULVER. A Saxon word for pigeon, whence Culver-cliff, Reculvers, &c., from being resorted to by those birds. [Latin, _columba_; _b_ and _v_ are often interchanged.] CULVERIN. An ancient cannon of about 5-1/4 inches bore, and from 9 to 12 feet long, carrying a ball of 18 pounds, with a first graze at 180 paces. Formerly a favourite sea-gun, its random range being 2500 paces. The name is derived from a snake (_coluber_), or a dragon, being sculptured upon it, thus forming handles. CULVER-TAIL. The fastenings of a ship's carlings into the beams. CULVER-TAILED. Fastened by dove-tailing--a way of letting one timber into another, so that they cannot slip asunder. CULWARD. The archaic term for a coward. CUMULO-CIRRO-STRATUS. A horizontal sheet of cloud, with cirrus above and cumulus beneath; it is better known as the _nimbus_ or _rain-cloud_. CUMULO-STRATUS. This is the twain-cloud, so called because the stratus blends with the cumulus; it is most frequent during a changeable state of the barometer. CUMULUS. A cloud indicative of fair weather, when it is small: it is sometimes seen in dense heaps, whence it obtained the name of _stacken cloud_. It is then a forerunner of change. CUND, TO. To give notice which way a shoal of fish is gone. CUNETTE. _See_ CUVETTE. CUNN, OR CON. _See_ CONN. CUNNENG. A northern name for the lamprey. CUP. A solid piece of cast-iron let into the step of the capstan, and in which the iron spindle at the heel of the capstan works. Also, colloquially used for come, as, "Cup, let me alone." CUPOLA-SHIP. Captain Coles's; the cupola being discontinued, now called _turret-ship_ (which see). CUR. An east-country term for the bull-head. CURE, TO. To salt meat or fish. CUR-FISH. A small kind of dog-fish. CURIET. A breast-plate made of leather. CURL. The bending over or disruption of the ice, causing it to pile. Also, the curl of the surf on the shore. CURL-CLOUD. The same as _cirrus_ (which see). CURLEW. A well-known coast bird, with a long curved bill, the _Numenius arquatus_. CURRACH. A skiff, formerly used on the Scottish coasts. CURRA-CURRA. A peculiarly fast boat among the Malay Islands. CURRENT. A certain progressive flowing of the sea in one direction, by which all bodies floating therein are compelled more or less to submit to the stream. The _setting_ of the current, is that point of the compass towards which the waters run; and the _drift_ of the current is the rate it runs at in an hour. Currents are general and particular, the former depending on causes in constant action, the latter on occasional circumstances. (_See_ DIRECTION.) CURRENT SAILING. The method of determining the true motion of a ship, when, besides being acted upon by the wind, she is drifting by the effect of a current. A due allowance must therefore be made by the navigator. CURRIER. A small musketoon with a swivel mounting. CURSOR. The moving wire in a reading microscope.