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An order of free-swimming marine worms, of which the genus Sagitta is the type. They have groups of curved spines on each side of the head.

characterized by the presence of lateral setæ, or spines, on most or all of the segments. They are divided into two principal groups: Oligochæta, including the earthworms and allied forms, and Polychæta, including most of the marine species.

g gear (Naut.), any material used to protect sails, rigging, or the like, at points where they are exposed to friction.

t, of restraint, of ornament, of the exertion and transmission of mechanical power, etc. [They] put a chain of gold about his neck. Dan. v. 29.

A signal made for a parley by beat of a drum. They beat the chamade, and sent us carte blanche. Addison.

To bite or chew impatiently. They began . . . irefully to champ upon the bit. Hooker.

anything really existing, anything that is truly an agent or the cause of any event; but they signify merely men's ignorance of the real and immediate cause. Samuel Clark. Any society into which chance might throw him. Macaulay. That power Which erring men call Chance. Milton.

g else; as, to change the clothes; to change one's occupation; to change one's intention. They that do change old love for new, Pray gods, they change for worse! Peele.

stirrups, joined at the top and fastened to the pommel or the frame of the saddle, after they have been adjusted to the convenience of the rider. [Written also chaplet.]

A genus of flowerless plants, having articulated stems and whorled branches. They flourish in wet places.

To attract irresistibly; to delight exceedingly; to enchant; to fascinate. They, on their mirth and dance Intent, with jocund music charm his ear. Milton.

Of or pertaining to a chasm; abounding in chasms. Carlyle. They cross the chasmy torrent's foam-lit bed. Wordsworth.

To purify from errors or faults; to refine. They [classics] chasten and enlarge the mind, and excite to noble actions. Layard.

s, who, about 1793, pillaged, burned, and killed in parts of France; -- so called because they used to burn the feet of their victims to extort money.

looped. -- Check list, a list or catalogue by which things may be verified, or on which they may be checked. -- Check nut (Mech.), a secondary nut, screwing down upon the primary nut to secure it. Knight. -- Check valve (Mech.), a valve in the feed pipe of a boiler to prevent the return of the feed water. -- To ta…

having four toes of each of the anterior limbs elongated and connected by a web, so that they can be used like wings in flying. See Bat.

air of mouth organs, terminated by a pincherlike claw, in scorpions and allied Arachnida. They are homologous with the falcers of spiders, and probably with the mandibles of insects.

The force exerted between the atoms of elementary substance whereby they unite to form chemical compounds; chemical attaction; affinity; -- sometimes used as a general expression for chemical activity or relationship.

branch of science which treats of the composition of substances, and of the changes which they undergo in consequence of alterations in the constitution of the molecules, which depend upon variations of the number, kind, or mode of arrangement, of the constituent atoms. These atoms are not assumed to be indivisible, bu…

organisms, as bacteria, zoöspores of algæ, etc., to chemical substances held in solution. They may be attracted (positive chemotaxis) or repelled (negative chemotaxis). -- Chem`o*tac"tic (#), a. -- Chem`o*tac"tic*al*ly, adv.