CYANOGEN, noun [Gr., blue, and to beget.] Carbureted azote, or carburet of nitrogen, the compound base of Prussic acid; otherwise called Prussine.

CYATHIFORM, adjective [Latin , a cup; Gr.] In the form of a cup, or drinking glass, a little widened at the top.

CYCLADES, noun plural [Gr., a circle.] A number of isles arranged round the isle of delos, in the Grecian Sea, in the form of a circle.

CYCLE, noun [Gr. Latin , an orb or circle.]

1. In chronology, a period or series of numbers, which regularly proceed from first to last, and then return to the first, in a perpetual circle. Hence,

2. The cycle of the moon, or golden number, or Metonic cycle so called from its inventor Meton, is a period of nineteen years, which being completed, the new and full moons return on the same days of the month.

3. The cycle of the sun, is a period of twenty eight years, which having elapsed, the dominical or Sunday letters return to their former place, and proceed in the former order, according to the Julian calendar.

4. cycle of indiction, a period of fifteen years, at the end of which the Roman emperors imposed an extraordinary tax, to pay the soldiers who were obliged to serve in the army for that period and no longer.

5. A round of years, or period of time, in which the same course begins again; a periodical space of time.

6. An imaginary orb or circle in the heavens.

CYCLOGRAPH, noun [circle, and to describe.] An instrument for describing the arcs of circles.

CYCLOID, noun A geometrical curve on which depends the doctrine of pendulums; a figure made by the upper end of the diameter of a circle, turning about a right line. The genesis of a cycloid may be conceived by imagining a nail in the circumference of a wheel; the line which the nail describes in the air, while the wheel revolves in a right line, is the cycloid

CYCLOIDAL, adjective Pertaining or relating to a cycloid; as, the cycloidal space is the space contained between the cycloid and its substance. Or the space contained between the curve or crooked line and the subtense of the figure.

CYCLOLITE, noun A name given to Madrepores.

CYCLOMETRY, noun [Gr., circle, to measure.] The art of measuring cycles or circles.

CYCLOPEAN, adjective [from Cyclops.] Pertaining to the Cyclops; vast; terrific.

CYCLOPEDIA, CYCOPEDE, noun [Gr., circle, discipline, erudition.] The circle or compass of the arts and sciences; circle of human knowledge. Hence, the book or books that contain treatises on every branch of the arts and sciences, arranged under proper heads, in alphabetical order. [See Encyclopedia.]

CYCLOPIC, adjective Pertaining to the Cyclops; gigantic; savage.

CYCLOPS, noun [Gr., a circle, an eye.] In fabulous history, certain giants, the sons of Neptune and Amshitrite, who had but one circular eye in the midst of the forehead. They inhabited Sicily, and assisted Vulcan in making thunderbolts for Jupiter.

CYCLOPEDIA, CYCOPEDE noun [Gr., circle, discipline, erudition.] The circle or compass of the arts and sciences; circle of human knowledge. Hence, the book or books that contain treatises on every branch of the arts and sciences, arranged under proper heads, in alphabetical order. [See Encyclopedia.]

CYDER. [See Cider.]

CYGNET, noun [Latin , a swan; Gr.] A young swan.

CYLINDER, noun [Gr. To roll; Latin ] In geometry, a solid body supposed to be generated by the rotation of a parallelogram round one of its sides; or a long circular body of uniform diameter, and its extremities forming equal parallel circles.

CYLINDRACEOUS, adjective Cylindrical. [Little used.]

CYLINDRIC, CYLINDRICAL, adjective Having the form of a cylinder; or partaking of its properties.

CYLINDRIC, CYLINDRICAL adjective Having the form of a cylinder; or partaking of its properties.

CYLINDRIFORM, adjective [cylinder and form.] Having the form of a cylinder.

CYLINDROID, noun [cylinder and form.] A solid body, approaching to the figure of a cylinder, but differing in some respects, as having the bases elliptical, but parallel and equal.

CYMATIUM, cyma noun [Latin , Gr., a little wave.] In architecture, a member or molding of the cornice, the profile of which is waving, that is, concave at the top and convex at bottom.

CYMAR, noun A slight covering; a scarf; properly, simar.

CYMATIUM, CYMA, noun [Latin , Gr., a little wave.] In architecture, a member or molding of the cornice, the profile of which is waving, that is, concave at the top and convex at bottom.

CYMBAL, noun [Latin , Gr.]

1. A musical instrument used by the ancients, hollow and made of brass, somewhat like a kettle-drum; but the precise form is not ascertained.

2. A mean instrument used by gypsies and vagrants, made of a steel wire, in a triangular form, on which are passed fie rings, which are touched and shifter along the triangle with an iron rod held in the left hand, while it is supported in the right by a ring, to give it free motion.

CYMBIFORM, adjective [Latin , a boat, form.] Shaped like a boat.

CYME, CYMA, noun [Gr., fetus, to swell.] Literally, a sprout, particularly of the cabbage. Technically, an aggregate flower composed of several florets sitting on a receptacle, producing all the primary peduncles from the same point, but having the partial peduncles scattered and irregular; all fastigiate, or forming a flat surface at the top. It is naked or with bractes.

CYMLING, noun A squash.

CYMOPHANE, noun [Gr., a wave, to appear.] A mineral, called also chrysoberyl. Its color is green of different shades; its fracture conchyoidal or undulated, and in hardness it ranks next to the sapphire.

CYMOPHANOUS, adjective Having a wavy floating light; opalescent; chatoyant.

CYMOSE, CYMOUS, adjective Containing a cyme; in the form of a cyme.

CYMOSE, CYMOUS adjective Containing a cyme; in the form of a cyme.

CYNANCHE, noun [Gr., a dog-collar, angina; a dog, to press or bind, to suffocate.] A disease of the throat, attended with inflammation, swelling, and difficulty of breathing and swallowing. It is of several kinds and comprehends the quinsy, croop and malignant sore throat.

CYNANTHROPY, noun [Gr., a dog, man.] A kind of madness in which men have the qualities of dogs.

CYNARCTOMACHY, noun [Gr., a dog, a bear, a fight.] Bear-baiting with a dog. [A barbarous word.]

CYNIC, CYNICAL, adjective [Gr., canine, a dog.] Having the qualities of a surly dog; snarling; captious; surly; currish; austere.

CYNIC, CYNICAL adjective [Gr., canine, a dog.] Having the qualities of a surly dog; snarling; captious; surly; currish; austere.

Cynic spasm, a kind of convulsion, in which the patient imitates the howling of dogs.

CYNIC, noun A man of a canine temper; a surly or snarling man or philosopher; a follower of Diogenes; a misanthrope.

CYNICALLY, adverb In a snarling, captious or morose manner.

CYNICALNESS, noun Moroseness; contempt of riches and amusements.

CYNICS, noun In ancient history, a sect of philosophers, who valued themselves on their contempt of riches, of arts, sciences and amusements. They are said to owe their origin to Antisthenes of Athens.

CYNOSURE, noun [Gr., the tail of the dog, ursa minor, the little bear.] The constellation near the north pole, consisting of seven stars, four of which are disposed like the four wheels of a chariot, and three lengthwise, like the beam; hence called the chariot or Charless wain. As seamen are accustomed to steer by this constellation, ti si sometimes taken for that which directs or attracts attention.

CYON. [See Cion.]

CYPHER. [See Cipher.]

CYPRESS, noun [Latin , Gr.]

1. A genus of plants or trees. The most remarkable are the sempervirens or common cypress the evergreen American cypress or white cedar, and the disticha or deciduous American cypress The wood of these trees is remarkable for its durability. The coffins in which the Athenian heroes and the mummies of Egypt were deposited, are said to have been made of the first species.

2 The emblem of mourning for the dead, cypress branches having been anciently used at funerals.

Had success attended the Americans, the death of Warren would have been sufficient to damp the joys of victory, and the cypress would have been united with the laurel.

CYPRIN, adjective Pertaining to the fish of the genus Cyprinus.

CYPRUS, noun A thin transparent black stuff.

CYRIOLOGIC, adjective [Gr., a chief, discourse.] Relating or pertaining to capital letters.

CYST, noun [Gr., a bladder.] A bag or tunic which includes morbid matter in animal bodies.

CYSTIC, adjective Pertaining to a cyst, or contained in a cyst. The cystic duct is the membranous canal that conveys the bile from the hepatic duct into the gall bladder. The cystic artery is a branch of the hepatic.

CYSTIC oxyd, a name given to a peculiar substance, supposed to be generated in the bladder or rather in the kidneys.

CYS'TOCELE, noun [Gr., a bladder or a tumor.] A hernia or rupture formed by the protrusion of the urinary bladder.

CYSTOT'OMY, noun [Gr., a bladder or to cut.] The act or practice of opening encysted tumors, for the discharge of morbid matter.

CYT'ISUS, noun A shrub or tree. Also, a genus of trees; tree-trefoil.