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hen reduced obtained as a hard, silver-white, difficulty fusible metal. Symbol Mo. Atomic weight 95.9.

Importance, as in influence or effect; consequence; weight or value; consideration. Matters of great moment. Shak. It is an abstruse speculation, but also of far less moment and consequence of us than the others. Bentley.

Of moment or consequence; very important; weighty; as, a momentous decision; momentous affairs. -- Mo*men"tous*ly, adv. -- Mo*men"tous*ness, n.

The weight or hammer of a pile driver, that is, a very heavy mass of iron, which, being raised on high, falls on the head of the pile, and drives it into the earth; the falling weight of a drop hammer used in forging.

ithout water, fuel, or accumulators necessary for propulsion) not more than three hundred weight (336 lbs.).

Muscular strength or development; as, to show one's muscle by lifting a heavy weight. [Colloq.]

A metric weight, consisting of ten thousand grams or ten kilograms. It is equal to 22.046 lbs. avoirdupois.

ng, the horizontal cross timber which goes through the wall or a pier, and upon which the weight of the wall rests, when a building is shored up to allow of alterations in the lower part. -- Needle furze (Bot.), a prickly leguminous plant of Western Europe; the petty whin (Genista Anglica). -- Needle gun, a firearm l…

n elementary substance which forms one of the constituents of didymium. Symbol Nd. Atomic weight 140.8.

verings, wraps, etc.; free from charges, deductions, etc; as, net profit; net income; net weight, etc. [Less properly written nett.] Net tonnage (Naut.), the tonnage of a vessel after a deduction from the gross tonnage has been made, to allow space for crew, machinery, etc.

n the mineral niccolite, and with arsenic and sulphur in nickel glance. Symbol Ni. Atomic weight 58.6.

nervous troubles, and characterized by a sense of extreme uneasiness or discomfort (as of weight on the chest or stomach, impossibility of motion or speech, etc.), or by frightful or oppressive dreams, from which one wakes after extreme anxiety, in a troubled state of mind; incubus. Dunglison.

d is a constituent of all organized living tissues, animal or vegetable. Symbol N. Atomic weight 14. It was formerly regarded as a permanent noncondensible gas, but was liquefied in 1877 by Cailletet of Paris, and Pictet of Geneva.

A weight of twelve grains; or, according to some, of ten grains, or half a scruple. [Written also obol.]

An ancient weight, the sixth part of a drachm.

A Turkish and Egyptian weight, equal to about 2

An instrument for ascertaining the weight and purity of oil; an elaiometer.

To produce a sensation of weight in (some part of the body); as, my lungs are oppressed by the damp air; excess of food oppresses the stomach.

wering; hard to be borne; as, oppressive grief or woe. To ease the soul of one oppressive weight. Pope. -- Op*press"ive*ly, adv. -- Op*press"ive*ness, n.

wn. Its tetroxide is used in histological experiments to stain tissues. Symbol Os. Atomic weight 191.1. Specific gravity 22.477.