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Viscin :: Viscin (n.) A clear, viscous, tasteless substance extracted from the mucilaginous sap of the mistletoe (Viscum album), holly, etc., and constituting an essential ingredient of birdlime..

Opera :: Opera (n.) A drama, either tragic or comic, of which music forms an essential part; a drama wholly or mostly sung, consisting of recitative, arials, choruses, duets, trios, etc., with orchestral accompaniment, preludes, and interludes, together with appropriate costumes, scenery, and action; a lyric drama..

Chrysarobin :: Chrysarobin (n.) A bitter, yellow substance forming the essential constituent of Goa powder, and yielding chrysophanic acid proper; hence formerly called also chrysphanic acid..

Necessary :: Necessary (a.) Impossible to be otherwise, or to be dispensed with, without preventing the attainment of a desired result; indispensable; requiste; essential..

Mutability :: Mutability (n.) The quality of being mutable, or subject to change or alteration, either in form, state, or essential character; susceptibility of change; changeableness; inconstancy; variation..

Dolerite :: Dolerite (n.) A dark-colored, basic, igneous rock, composed essentially of pyroxene and a triclinic feldspar with magnetic iron. By many authors it is considered equivalent to a coarse-grained basalt..

Polariscope :: Polariscope (n.) An instrument consisting essentially of a polarizer and an analyzer, used for polarizing light, and analyzing its properties..

Sap :: Sap (n.) The juice of plants of any kind, especially the ascending and descending juices or circulating fluid essential to nutrition..

Isatogen :: Isatogen (n.) A complex nitrogenous radical, C8H4NO2, regarded as the essential residue of a series of compounds, related to isatin, which easily pass by reduction to indigo blue..

Bole :: Bole (n.) Any one of several varieties of friable earthy clay, usually colored more or less strongly red by oxide of iron, and used to color and adulterate various substances. It was formerly used in medicine. It is composed essentially of hydrous silicates of alumina, or more rarely of magnesia. See Clay, and Terra alba..

Groundwork :: Groundwork (n.) That which forms the foundation or support of anything; the basis; the essential or fundamental part; first principle.

Stamped :: Stammering (n.) A disturbance in the formation of sounds. It is due essentially to long-continued spasmodic contraction of the diaphragm, by which expiration is preented, and hence it may be considered as a spasmodic inspiration..

Accident :: Accident (n.) A property attached to a word, but not essential to it, as gender, number, case..

Gyrostat :: Gyrostat (n.) A modification of the gyroscope, consisting essentially of a fly wheel fixed inside a rigid case to which is attached a thin flange of metal for supporting the instrument. It is used in studying the dynamics of rotating bodies..

Substantialness :: Substantially (adv.) In a substantial manner; in substance; essentially.

Methylene :: Methylene (n.) A hydrocarbon radical, CH2, not known in the free state, but regarded as an essential residue and component of certain derivatives of methane; as, methylene bromide, CH2Br2; -- formerly called also methene..

Imitation :: Imitation (n.) One of the principal means of securing unity and consistency in polyphonic composition; the repetition of essentially the same melodic theme, phrase, or motive, on different degrees of pitch, by one or more of the other parts of voises. Cf. Canon..

Tephrite :: Tephrite (n.) An igneous rock consisting essentially of plagioclase and either leucite or nephelite, or both..

Tangle :: Tangle (v.) An instrument consisting essentially of an iron bar to which are attached swabs, or bundles of frayed rope, or other similar substances, -- used to capture starfishes, sea urchins, and other similar creatures living at the bottom of the sea..

Hesperornis :: Hesperornis (n.) A genus of large, extinct, wingless birds from the Cretaceous deposits of Kansas, belonging to the Odontornithes. They had teeth, and were essentially carnivorous swimming ostriches. Several species are known. See Illust. in Append..

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