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The process of converting venous blood into arterial blood during its passage through the lungs, oxygen being absorbed and carbonic acid evolved; -- called also aëration and hematosis.

adow at noon; -- applied to the inhabitants of the torrid zone, who have, twice a year, a vertical sun.

The act or offense of grubbing up trees and bushes, and thus destroying the tickets or coverts of a forest. Spelman. Cowell.

similating body; to absorb or appropriate, as nourishment; as, food is assimilated and converted into organic tissue. Hence also animals and vegetables may assimilate their nourishment. Sir I. Newton. His mind had no power to assimilate the lessons. Merivale.

To overtake. [Obs.] Chaucer.

The first vertebra of the neck, articulating immediately with the skull, thus sustaining the globe of the head, whence the name.

Not inverted; orthotropous.

To assail with unfriendly speech or writing; to begin a controversy with; to attempt to overthrow or bring into disrepute, by criticism or satire; to censure; as, to attack a man, or his opinions, in a pamphlet.

To overtake. [Obs.] Bacon.

To sell by auction; to auction. Estates . . . advertised and auctioneered away. Cowper.

To occasion; to originate. [Obs.] Such an overthrow . . . I have authored. Chapman.

e of being used for the accomplishment of a purpose; usable; profitable; advantageous; convertible into a resource; as, an available measure; an available candidate. Struggling to redeem, as he did, the available months and days out of so many that were unavailable. Carlyle. Having no available funds with which to pay…

To avert; to ward off. [Obs.] Hudibras.

The act of averting. [Obs.]

The class of Vertebrata that includes the birds.

the axis of a cylinder, i. e., the axis of a cone, that is, the straight line joining the vertex and the center of the base; the axis of a circle, any straight line passing through the center.

a railway car or truck, by which an axle box is held laterally, and in which it may move vertically; -- also called a jaw in the United States, and a housing in England.

An arc of the horizon intercepted between the meridian of the place and a vertical circle passing through the center of any object; as, the azimuth of a star; the azimuth or bearing of a line surveying.

olumn of bones in the back which sustains and gives firmness to the frame; the spine; the vertebral or spinal column.

Vertebrate.