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That which is required; an imperative or authoritative command; an essential condition; something needed or necessary; a need. One of those who believe that they can fill up every requirement contained in the rule of righteousness. J. M. Mason. God gave her the child, and gave her too an instinctive knowledge of its na…

nductors of electricity, have a vitreous fracture, and are soluble in ether, alcohol, and essential oils, but not in water; specif., pine resin (see Rosin).

abdomen, and short stature, together with clear and often premature mental faculties. The essential cause of the disease appears to be the nondeposition of earthy salts in the osteoid tissues. Children afflicted with this malady stand and walk unsteadily. Called also rachitis.

nd toluidine, as a colorless crystalline substance which forms red salts. These salts are essential components of many of the socalled aniline dyes, as fuchsine, aniline red, etc. By extension, any one of the series of substances derived from, or related to, rosaniline proper.

A green micaceous mineral occurring in minute scales. It is essentially a silicate of aluminia and potash containing vanadium.

o bring to destruction; to bring to poverty or bankruptcy; to impair seriously; to damage essentially; to overthrow. this mortal house I'll ruin. Shak. By thee raised, I ruin all my foes. Milton. The eyes of other people are the eyes that ruin us. Franklin. By the fireside there are old men seated, Seeling ruined citie…

tassium aluminium sulphate. See under Double. -- Epsom salts. See in the Vocabulary. -- Essential salt (Old Chem.), a salt obtained by crystalizing plant juices. -- Ethereal salt. (Chem.) See under Ethereal. -- Glauber's salt or salts. See in Vocabulary. -- Haloid salt (Chem.), a simple salt of a halogen acid, as…

f plants of any kind, especially the ascending and descending juices or circulating fluid essential to nutrition.

A soapy mixture obtained by treating an essential oil with an alkali; hence, any similar compound of an essential oil. [Written also saponule.] [Obs.]

mployment; a sedentary life. Any education that confined itself to sedentary pursuits was essentially imperfect. Beaconsfield.

Having all the essential working parts connected by a bedplate or framework, or contained in a case, etc., so that mutual relations of the parts do not depend upon fastening outside of the machine itself. Self-contained steam engine. (a) A steam engine having both bearings for the crank shaft attached to the frame of t…

plete rings of the upper part of the bronchial tubes of most birds. The semerings form an essential part of the syrinx, or musical organ, of singing birds.

An apparatus consisting essentially of a mirror moved by clockwork so as to throw the rays of the sun or a star in a fixed direction; -- a more general term for heliostat.

ay slate, impregnated with bitumen. -- Hornblende slate (Min.), a slaty rock, consisting essentially of hornblende and feldspar, useful for flagging on account of its toughness. -- Slate ax or axe, a mattock with an ax end, used in shaping slates for roofs, and making holes in them for the nails. -- Slate clay (Geol…

fashionable, than he really is; a vulgar upstart; one who apes his superiors. Thackeray. Essentially vulgar, a snob. -- a gilded snob, but none the less a snob. R. G. White.

awing soda water, fitted with delivery tube, faucets, etc. -- Soda lye, a lye consisting essentially of a solution of sodium hydroxide, used in soap making. -- Soda niter. See Nitratine. -- Soda salts, salts having sodium for the base; specifically, sodium sulphate or Glauber's salts. -- Soda waste, the waste mater…

tain hours. -- Solar lamp, an argand lamp. -- Solar microscope, a microscope consisting essentially, first, of a mirror for reflecting a beam of sunlight through the tube, which sometimes is fixed in a window shutter; secondly, of a condenser, or large lens, for converging the beam upon the object; and, thirdly, of a…

A myth which essentially consists of allegory based upon ideas as to the sun's course, motion, influence, or the like.

The seat of real life or vitality; the source of action; the animating or essential part. "The hidden soul of harmony." Milton. Thou sun, of this great world both eye and soul. Milton.

[d]ing in moral virtue was his speech. Chaucer. -- To sound in damages (Law), to have the essential quality of damages. This is said of an action brought, not for the recovery of a specific thing, as replevin, etc., but for damages only, as trespass, and the like.