Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of essential is as below...

Thienyl :: Thienyl (n.) The hypothetical radical C4H3S, regarded as the essential residue of thiophene and certain of its derivatives..

Fundamental :: Fundamental (n.) A leading or primary principle, rule, law, or article, which serves as the groundwork of a system; essential part, as, the fundamentals of the Christian faith..

Monomorphous :: Monomorphous (a.) Having but a single form; retaining the same form throughout the various stages of development; of the same or of an essentially similar type of structure; -- opposed to dimorphic, trimorphic, and polymorphic..

Condition :: Condition (n.) Essential quality; property; attribute.

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..

Propionyl :: Propionyl (n.) The hypothetical radical C3H5O, regarded as the essential residue of propionic acid and certain related compounds..

Essential :: Essential (a.) Necessary; indispensable; -- said of those tones which constitute a chord, in distinction from ornamental or passing tones..

Uran-ochre :: Uran-ochre (n.) A yellow, earthy incrustation, consisting essentially of the oxide of uranium, but more or less impure..

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..

Siderostat :: Siderostat (n.) 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.

Discipline :: Discipline (n.) A system of essential rules and duties; as, the Romish or Anglican discipline..

Variation :: Variation (n.) Repetition of a theme or melody with fanciful embellishments or modifications, in time, tune, or harmony, or sometimes change of key; the presentation of a musical thought in new and varied aspects, yet so that the essential features of the original shall still preserve their identity..

Entry :: Entry (n.) The act in addition to breaking essential to constitute the offense or burglary.

Pyrethrin :: Pyrethrin (n.) A substance resembling, and isomeric with, ordinary camphor, and extracted from the essential oil of feverfew; -- called also Pyrethrum camphor..

Anomaly :: Anomaly (n.) Any deviation from the essential characteristics of a specific type.

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..

Diachylum :: Diachylum (n.) A plaster originally composed of the juices of several plants (whence its name), but now made of an oxide of lead and oil, and consisting essentially of glycerin mixed with lead salts of the fat acids..

Determination :: Determination (n.) The act of defining a concept or notion by giving its essential constituents.

Octyl :: Octyl (n.) A hypothetical hydrocarbon radical regarded as an essential residue of octane, and as entering into its derivatives; as, octyl alcohol..

Propinyl :: Propinyl (n.) A hydrocarbon radical regarded as an essential residue of propine and allied compounds.

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