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The act of swimming across, as a river.

The umbrellalike disk, or swimming bell, of a jellyfish.

An extensive artificial group of birds including the wading, swimming, and cursorial birds.

bivalve mollusk in the state when it is furnished with one or two ciliated membranes for swimming.

, ribbonlike, very delicate, transparent and iridescent ctenophore (Cestum Veneris) which swims in the open sea. Its form is due to the enormous development of two spheromeres. See Illust. in Appendix. -- Venus's hair (Bot.), a delicate and graceful fern (Adiantum Capillus-Veneris) having a slender, black and shining…

Dizziness or swimming of the head; an affection of the head in which objects, though stationary, appear to move in various directions, and the person affected finds it difficult to maintain an erect posture; giddiness. Quian.

d, etc. So eagerly the fiend . . . With head, hands, wings, or feet, pursues his way, And swims, or sinks, or wades, or creeps, or flies. Milton.

of the family Dytiscidæ, and to various genera of the family Hydrophilidæ. These beetles swim with great agility, the fringed hind legs acting together like oars.

ellipsiprymnus) native of Central Africa. It frequents the banks of rivers and is a good swimmer. It has a white ring around the rump. Called also photomok, water antelope, and waterbok.

tic Entomostraca belonging to the genera Cyclops, Daphnia, etc; -- so called because they swim with sudden leaps, or starts.

allied genera of the family Hydrachnidæ, usually having the legs fringed and adapted for swimming. They are often red or red and black in color, and while young are parasites of fresh-water insects and mussels. Called also water tick, and water spider.

large lizard (Varanaus salvator) native of India. It frequents the borders of streams and swims actively. It becomes five or six feet long. Called also two-banded monitor, and kabaragoya. The name is also applied to other aquatic monitors.

legs are strong and their toes partially webbed. They live on the borders of streams, and swim well. They are remarkable as being the only rodents found in Australia.

Any one of several species of shrews having fringed feet and capable of swimming actively. The two common European species (Crossopus fodiens, and C. ciliatus) are the best known. The most common American water shrew, or marsh shrew (Neosorex palustris), is rarely seen, owing to its nocturnal habits.…

ith great celerity in a gyrating, or circular, manner, but they are also able to dive and swim rapidly. The larva is aquatic. Called also weaver, whirlwig, and whirlwig beetle.

birds, as the ostrich, auk, etc., the wings are used only as an assistance in running or swimming. As an eagle stirreth up her nest, fluttereth over her young, spreadeth abroad her wings, taketh them, beareth them on her wings. Deut. xxxii. 11.

Having the anterior lobes of the foot so modified as to form a pair of winglike swimming organs; -- said of the pteropod mollusks.

A spore provided with one or more slender cilia, by the vibration of which it swims in the water. Zoöspores are produced by many green, and by some olive-brown, algæ. In certain species they are divided into the larger macrozoöspores and the smaller microzoöspores. Called also sporozoid, and swarmspore.…