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A genus of marine bivalves, having a pearly interior, allied to the pearl oyster; -- so called from a supposed resemblance of the typical species to a bird.

Of or pertaining to a bird or to birds.

See prehensile processes on the cells of some Bryozoa, often having the shape of a bird's bill.

Of or pertaining to the clavicle.

Below the clavicle; as, the infraclavicular fossa.

Between the clavicles; as, the interclavicular notch of the sternum.

Shaped like a boat; cymbiform; scaphoid; as, the navicular glumes of most grasses; the navicular bone. Navicular bone. (Anat.) (a) One of the middle bones of the tarsus, corresponding to the centrale; -- called also scaphoid. (b) A proximal bone on the radial side of the carpus; the scaphoid. -- Navicular disease (Far…

One of the minute spindle-shaped embryos of Gregarinæ and some other Protozoa.

Situated above the clavicle.

ge, a migratory bird. -- Bird spider (Zoöl.), a very large South American spider (Mygale avicularia). It is said sometimes to capture and kill small birds. -- Bird tick (Zoöl.), a dipterous insect parasitic upon birds (genus Ornithomyia, and allies), usually winged.

The knotgrass (Polygonum aviculare).

developed stomach and intestinal canal; but these parts are lacking in the other zooids (Avicularia, Ooecia, etc.).

A weed with a sterm of many joints (Illecebrum verticillatum); also, the Polygonum aviculare or knotgrass.

central, bones of the carpus or or tarsus. In the tarsus of man it is represented by the navicular.

od of geese; -- called also catchweed and cleavers. (b) A species of knotgrass (Polygonum aviculare). (c) The annual spear grass (Poa annua). -- Goose neck, anything, as a rod of iron or a pipe, curved like the neck of a goose; specially (Naut.), an iron hook connecting a spar with a mast. -- Goose quill, a large fea…

a common weed with jointed stems (Polygonum aviculare); knotweed.

earth, which are often furnished with a trapdoor. The South American bird spider (Mygale avicularia), and the crab spider, or matoutou (M. cancerides) are among the largest species. Some of the species are erroneously called tarantulas, as the Texas tarantula (M. Hentzii).

Same as Pseudonavicula.

A minute parasite, usually the young of Gregarinæ, in the pseudonavicula stage.

bones, which articulates with the radius; the radiale. (b) One of the tarsal bones; the navicular bone. See under Navicular.