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Thionyl :: Thionyl (n.) The hypothetical radical SO, regarded as an essential constituent of certain sulphurous compounds; as, thionyl chloride..

Rickets :: Rickets (n. pl.) A disease which affects children, and which is characterized by a bulky head, crooked spine and limbs, depressed ribs, enlarged and spongy articular epiphyses, tumid 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..

Substantiated :: Substantials (n. pl.) Essential parts.

Intrapetiolar :: Intrapetiolar (a.) Situated between the petiole and the stem; -- said of the pair of stipules at the base of a petiole when united by those margins next the petiole, thus seeming to form a single stipule between the petiole and the stem or branch; -- often confounded with interpetiolar, from which it differs essentially in meaning..

Stereoscope :: Stereopticon (n.) An instrument, consisting essentially of a magic lantern in which photographic pictures are used, by which the image of a landscape, or any object, may be thrown upon a screen in such a manner as to seem to stand out in relief, so as to form a striking and accurate representation of the object itself; also, a pair of magic lanterns for producing the effect of dissolving views..

Sycock :: Sycoceryl (n.) A radical, of the aromatic series, regarded as an essential ingredient of certain compounds found in the waxy resin of an Australian species of fig..

Formal :: Formal (a.) Belonging to the constitution of a thing, as distinguished from the matter composing it; having the power of making a thing what it is; constituent; essential; pertaining to or depending on the forms, so called, of the human intellect..

Famish :: Famish (v. i.) To suffer extremity from deprivation of anything essential or necessary.

Vaseline :: Vaseline (n.) A yellowish translucent substance, almost odorless and tasteless, obtained as a residue in the purification of crude petroleum, and consisting essentially of a mixture of several of the higher members of the paraffin series. It is used as an unguent, and for various purposes in the arts. See the Note under Petrolatum..

Heart :: Heart (n.) The nearest the middle or center; the part most hidden and within; the inmost or most essential part of any body or system; the source of life and motion in any organization; the chief or vital portion; the center of activity, or of energetic or efficient action; as, the heart of a country, of a tree, etc..

Pith :: Pith (n.) Hence: The which contains the strength of life; the vital or essential part; concentrated force; vigor; strength; importance; as, the speech lacked pith..

Glycolyl :: Glycolyl (n.) A divalent, compound radical, CO.CH2, regarded as the essential radical of glycolic acid, and a large series of related compounds..

Element :: Element (n.) One of the simplest essential parts, more commonly called cells, of which animal and vegetable organisms, or their tissues and organs, are composed..

Mortify :: Mortify (v. t.) To destroy the active powers or essential qualities of; to change by chemical action.

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..

Description :: Description (n.) A sketch or account of anything in words; a portraiture or representation in language; an enumeration of the essential qualities of a thing or species.

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..

Extract :: Extract (n.) A decoction, solution, or infusion made by drawing out from any substance that which gives it its essential and characteristic virtue; essence; as, extract of beef; extract of dandelion; also, any substance so extracted, and characteristic of that from which it is obtained; as, quinine is the most important extract of Peruvian bark..

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

Inessential :: Inessential (a.) Not essential; unessential.

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