ATMOSPHERIC; ATMOSPHERICAL a.
ospheric engine, a steam engine whose piston descends by the pressure of the atmosphere, when the steam which raised it is condensed within the cylinder. Tomlinson. -- Atmospheric line (Steam Engin.), the equilibrium line of an indicator card. Steam is expanded "down to the atmosphere" when its pressure is equal to th…
ATOMIC; ATOMICAL a.
oached by Leucippus, was developed by Democritus, and afterward improved by Epicurus, and hence is sometimes denominated the Epicurean philosophy. -- Atomic theory, or the Doctrine of definite proportions (Chem.), teaches that chemical combinations take place between the supposed ultimate particles or atoms of bodies,…
ATONEMENT n.
gy: The expiation of sin made by the obedience, personal suffering, and death of Christ. When a man has been guilty of any vice, the best atonement be can make for it is, to warn others. Spectator. The Phocians behaved with, so much gallantry, that they were thought to have made a sufficient atonement for their former…
ATTIC a. 3 definitions
Of or pertaining to Attica, in Greece, or to Athens, its principal city; marked by such qualities as were characteristic of the Athenians; classical; refined. Attic base (Arch.), a peculiar form of molded base for a column or pilaster, described by Vitruvius, applied under the Roman Empire to the Ionic and Corinthian a…