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Aniline :: Aniline (n.) An organic base belonging to the phenylamines. It may be regarded as ammonia in which one hydrogen atom has been replaced by the radical phenyl. It is a colorless, oily liquid, originally obtained from indigo by distillation, but now largely manufactured from coal tar or nitrobenzene as a base from which many brilliant dyes are made..

Valeryl :: Valeryl (n.) The hypothetical radical C5H9O, regarded as the essential nucleus of certain valeric acid derivatives..

Naphthyl :: Naphthyl (n.) A hydrocarbon radical regarded as the essential residue of naphthalene.

Octad :: Octad (n.) An atom or radical which has a valence of eight, or is octavalent..

Quinoxyl :: Quinoxyl (n.) The hypothetical radical of certain quinone derivatives related to rhodizonic acid.

Sulphionide :: Sulphion (n.) A hypothetical radical, SO4, regarded as forming the acid or negative constituent of sulphuric acid and the sulphates in electrolytic decomposition; -- so called in accordance with the binary theory of salts..

Acetyl :: Acetyl (n.) A complex, hypothetical radical, composed of two parts of carbon to three of hydrogen and one of oxygen. Its hydroxide is acetic acid..

Tolylene :: Tolylene (n.) A hydrocarbon radical, C6H4.(CH2)2, regarded as characteristic of certain toluene derivatives..

Oxalyl :: Oxalyl (n.) A hydrocarbon radical (C2O2) regarded as a residue of oxalic acid and occurring in derivatives of it.

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

Radical :: Radical (a.) Hence: Of or pertaining to the root or origin; reaching to the center, to the foundation, to the ultimate sources, to the principles, or the like; original; fundamental; thorough-going; unsparing; extreme; as, radical evils; radical reform; a radical party..

Degree :: Degree (n.) State as indicated by sum of exponents; more particularly, the degree of a term is indicated by the sum of the exponents of its literal factors; thus, a2b3c is a term of the sixth degree. The degree of a power, or radical, is denoted by its index, that of an equation by the greatest sum of the exponents of the unknown quantities in any term; thus, ax4 + bx2 = c, and mx2y2 + nyx = p, are both equations of the fourth degree..

Steatite :: Stearyl (n.) The hypothetical radical characteristic of stearic acid.

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

Artiad :: Artiad (a.) Even; not odd; -- said of elementary substances and of radicals the valence of which is divisible by two without a remainder.

Valence :: Valence (n.) The degree of combining power of an atom (or radical) as shown by the number of atoms of hydrogen (or of other monads, as chlorine, sodium, etc.) with which it will combine, or for which it can be substituted, or with which it can be compared; thus, an atom of hydrogen is a monad, and has a valence of one; the atoms of oxygen, nitrogen, and carbon are respectively dyads, triads, and tetrads, and have a valence respectively of two, three, and four..

Sans-culotte :: Sans-culotte (n.) Hence, an extreme or radical republican; a violent revolutionist; a Jacobin..

Hexdecyl :: Hexdecyl (n.) The essential radical, C16H33, of hecdecane..

Quadrivalent :: Quadrivalent (a.) Having a valence of four; capable of combining with, being replaced by, or compared with, four monad atoms; tetravalent; -- said of certain atoms and radicals; thus, carbon and silicon are quadrivalent elements..

Hexatomic :: Hexatomic (a.) Having six replaceable radicals.

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