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That swims; capable of swimming; adapted to, or used in, swimming; as, a swimming bird; a swimming motion.

In an easy, gliding manner, as if swimming; smoothly; successfully; prosperously.

Act or state of swimming; suffusion. "A swimmingness in the eye." Congreve.

Swimming in the open sea; -- said of certain marine animals.

g air-tight cells, or cavities which can be filled with air, to render persons buoyant in swimming.

A Linnæan order of aquatic birds swimming by means of webbed feet, as the duck, or of lobed feet, as the grebe. In this order were included the geese, ducks, auks, divers, gulls, petrels, etc.

A genus of small free-swimming Tunicata, shaped somewhat like a tadpole, and remarkable for resemblances to the larvæ of other Tunicata. It is the type of the order Copelata or Larvalia. See Illustration in Appendix.

Pertaining to water growing in water; living in, swimming in, or frequenting the margins of waters; as, aquatic plants and fowls.

A genus of small glassy heteropod mollusks found swimming at the surface in mid ocean. See Heteropod.

The larva of certain starfishes as developed in the free- swimming stage.

An aquatic hemipterous insect of the genus Notonecta; -- so called from swimming on its back, which gives it the appearance of a little boat. Called also boat fly, boat insect, boatman, and water boatman.

A swimming bird (Sula fiber or S. sula) related to the common gannet, and found in the West Indies, nesting on the bare rocks. It is so called on account of its apparent stupidity. The name is also sometimes applied to other species of gannets; as, S. piscator, the red-footed booby.

.) A peculiar early larval stage of certain starfishes, having a bilateral structure, and swimming by means of bands of vibrating cilia.

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.

The sensitiveness exhibited by small free-swimming 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.

Small, vibratory, swimming organs, somewhat resembling true cilia, as those of Ctenophora.

A class of Coelenterata, commonly ellipsoidal in shape, swimming by means of eight longitudinal rows of paddles. The separate paddles somewhat resemble combs.

The free-swimming, bivalve larva of certain Bryozoa.

ited; -- applied to a group of carinate birds (Desmognathæ), including various wading and swimming birds, as the ducks and herons, and also raptorial and other kinds.

One of the free-swimming sexual zooids of Siphonophora.