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potential surface, a surface for which the potential is for all points of the surface constant. Level surfaces on the earth are equipotential.

er an equivalent for damage done. He owned that, if the Test Act were repealed, the Protestants were entitled to some equivalent. . . . During some weeks the word equivalent, then lately imported from France, was in the mouths of all the coffeehouse. Macaulay.

reckoned from some particular date or epoch; a succession of years dating from some important event; as, the era of Alexander; the era of Christ, or the Christian era (see under Christian). The first century of our era. M. Arnold.

To catch sight of; to perceive with the eyes; to discover, as a distant object partly concealed, or not obvious to notice; to see at a glance; to discern unexpectedly; to spy; as, to espy land; to espy a man in a crowd. As one of them opened his sack to give his ass provender in the inn, . . . he espied his money. Gen.…

Important in the highest degree; indispensable to the attainment of an object; indispensably necessary. Judgment's more essential to a general Than courage. Denham. How to live -- that is the essential question for us. H. Spencer.

The staff of an army, including all officers above the rank of colonel, also, all adjutants, inspectors, quartermasters, commissaries, engineers, ordnance officers, paymasters, physicians, signal officers, judge advocates; also, the noncommissioned assistants of the above officers.

by the action of an appropriate solvent. They have usually a definite form, and are important as revealing the molecular structure. -- Etching needle, a sharp-pointed steel instrument with which lines are drawn in the ground or varnish in etching. -- Etching stitch (Needlework), a stitch used outline embroidery.…

Continued without intermission; perpetual; ceaseless; constant. And fires eternal in thy temple shine. Dryden.

inary illuminating gas. It is the second member of the paraffin series, and its most important derivatives are common alcohol, aldehyde, ether, and acetic acid. Called also dimethyl.

A native or inhabitant of Ethiopia; also, in a general sense, a negro or black man.

A colorless, gaseous hydrocarbon, C2H4, forming an important ingredient of illuminating gas, and also obtained by the action of concentrated sulphuric acid in alcohol. It is an unsaturated compound and combines directly with chlorine and bromine to form oily liquids (Dutch liquid), -- hence called olefiant gas. Called…

A native or inhabitant of ancient Etruria.

A native or inhabitant of Etruria.

A follower of Eudoxius, patriarch of Antioch and Constantinople in the 4th century, and a celebrated defender of the doctrines of Arius.

A contrivance for obtaining a light instantaneous, as a lucifer match. Brande & C.

Of or pertaining to Europe, or to its inhabitants. On the European plain, having rooms to let, and leaving it optional with guests whether they will take meals in the house; -- said of hotels. [U. S.]

Fig.: To make empty; to deprive. [R.] Evacuate the Scriptures of their most important meaning. Coleriage.

orthodox; -- technically applied to that party in the Church of England, and in the Protestant Episcopal Church, which holds the doctrine of "Justification by Faith alone"; the Low Church party. The term is also applied to other religion bodies not regarded as orthodox. Evangelical Alliance, an alliance for mutual stre…

ans eve is the evening before Christmas; also, the period immediately preceding some important event. "On the eve of death." Keble. Eve churr (Zoöl), the European goatsucker or nightjar; -- called also night churr, and churr owl.

ring eternity; always; forever; for an indefinite period; at all times; -- often used substantively with for. Seek the Lord . . . Seek his face evermore. Ps. cv. 4. And, behold, I am alive for evermore. Rev. i. 18. Which flow from the presence of God for evermore. Tillotson. I evermore did love you, Hermia. Shak.…