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Of or pertaining to the Tetrabranchiata. -- n.

Having the gills situated upon the neck; -- said of certain mollusks.

One of the gill-like breathing organs of certain aquatic insect larvæ. They contain tracheal tubes somewhat similar to those of other insects.

The gill of a crustacean in which the branchial filaments are slender and cylindrical, as in the crawfishes.

One of the Tubulibranchiata.

A group of gastropod mollusks having a tubular shell. Vermetus is an example.

A lower branch.

Having but one gill, as certain molluscs.

Same as Zygobranchia.

A division of marine gastropods in which the gills are developed on both sides of the body and the renal organs are also paired. The abalone (Haliotis) and the keyhole limpet (Fissurella) are examples.

Of or pertaining to the Zygobranchia.

A means of defense formed by felled trees, the ends of whose branches are sharpened and directed outwards, or against the enemy.

undeveloped; checked in normal development at a very early stage; as, spines are aborted branches. The eyes of the cirripeds are more or less aborted in their mature state. Owen.

At large; widely; broadly; over a wide space; as, a tree spreads its branches abroad. The fox roams far abroad. Prior.

ms are furnished with cup-shaped suckers, as the cuttlefishes, squids, and octopus; the Dibranchiata. See Cephalopoda.

re, phenomena, and laws. Acoustics, then, or the science of sound, is a very considerable branch of physics. Sir J. Herschel.

A second branch of a buck's antler. Howell.

One of a religious body, embracing several branches, who look for the proximate personal coming of Christ; -- called also Second Adventists. Schaff-Herzog Encyc.

That branch of agriculture dealing with the methods of conversion of agricultural products into manufactured articles; agricultural technology.

merican fish (Clupea vernalis) of the Herring family. It is called also ellwife, ellwhop, branch herring. The name is locally applied to other related species.