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A vertical water space in a fire box or combustion chamber.

A feather not fully developed; esp., a rudimentary feather just emerging through the skin.

Having part, or all, of the feathers imperfectly developed.

Any gorgonian which branches in a plumelike form.

To deprive of feathers; to strip. [R.]

The water violet (Hottonia palustris); also, the less showy American plant H. inflata.

A hook or clasp. The feather of an ostrich, fastened in her turban by an agraffe set with brilliants. Sir W. Scott.

A plume or tuft for the head composed of feathers, or of gems, etc. Prescott.

d on the walls of mines and quarries, chiefly hydrous sulphate of alumina; -- also called feather alum, and hair salt.

The two projecting feathered angles of the forehead of some birds; the frontal points.

endage of wood at the ship's stern, usually spreading like a fan and curved like a bird's feather. Audsley.

Naked spaces between the feathered areas of birds. See Pteryliæ.

of the Jurassic period, remarkable for having a long tapering tail of many vertebræ with feathers along each side, and jaws armed with teeth, with other reptilian characteristics.

species (A. giganteus) is remarkable for the great length and beauty of the wing and tail feathers of the male. The species A. Grayi inhabits Borneo.

A ring of hair or feathers on the legs.

A missile weapon of offense, slender, pointed, and usually feathered and barbed, to be shot from a bow. Broad arrow. (a) An arrow with a broad head. (b) A mark placed upon British ordnance and government stores, which bears a rude resemblance to a broad arrowhead.

A circle of feathers surrounding the opening of the ear of birds.

Feathers connecting the under surface of the wing and the body, and concealed by the closed wing.

Destitute of the natural or common covering on the head or top, as of hair, feathers, foliage, trees, etc.; as, a bald head; a bald oak. On the bald top of an eminence. Wordsworth.

(Haliæetus leucocephalus) of America. The young, until several years old, lack the white feathers on the head.