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Pure chemistry
(gcide) | Pure \Pure\, a. [Compar. Purer; superl. Purest.] [OE. pur,
F. pur, fr. L. purus; akin to putus pure, clear, putare to
clean, trim, prune, set in order, settle, reckon, consider,
think, Skr. p? to clean, and perh. E. fire. Cf. Putative.]
1. Separate from all heterogeneous or extraneous matter; free
from mixture or combination; clean; mere; simple; unmixed;
as, pure water; pure clay; pure air; pure compassion.
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The pure fetters on his shins great. --Chaucer.
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A guinea is pure gold if it has in it no alloy. --I.
Watts.
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2. Free from moral defilement or quilt; hence, innocent;
guileless; chaste; -- applied to persons. "Keep thyself
pure." --1 Tim. v. 22.
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Now the end of the commandment is charity out of a
pure heart, and of a good conscience. --1 Tim. i. 5.
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3. Free from that which harms, vitiates, weakens, or
pollutes; genuine; real; perfect; -- applied to things and
actions. "Pure religion and impartial laws." --Tickell.
"The pure, fine talk of Rome." --Ascham.
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Such was the origin of a friendship as warm and pure
as any that ancient or modern history records.
--Macaulay.
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4. (Script.) Ritually clean; fitted for holy services.
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Thou shalt set them in two rows, six on a row, upon
the pure table before the Lord. --Lev. xxiv.
6.
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5. (Phonetics) Of a single, simple sound or tone; -- said of
some vowels and the unaspirated consonants.
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Pure-impure, completely or totally impure. "The inhabitants
were pure-impure pagans." --Fuller.
Pure blue. (Chem.) See Methylene blue, under Methylene.
Pure chemistry. See under Chemistry.
Pure mathematics, that portion of mathematics which treats
of the principles of the science, or contradistinction to
applied mathematics, which treats of the application of
the principles to the investigation of other branches of
knowledge, or to the practical wants of life. See
Mathematics. --Davies & Peck (Math. Dict. )
Pure villenage (Feudal Law), a tenure of lands by uncertain
services at the will of the lord. --Blackstone.
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Syn: Unmixed; clear; simple; real; true; genuine;
unadulterated; uncorrupted; unsullied; untarnished;
unstained; stainless; clean; fair; unspotted; spotless;
incorrupt; chaste; unpolluted; undefiled; immaculate;
innocent; guiltless; guileless; holy.
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Pure chemistry
(gcide) | Chemistry \Chem"is*try\ (k[e^]m"[i^]s*tr[y^]; 277), n. [From
Chemist. See Alchemy.]
1. That branch of science which treats of the composition of
substances, and of the changes which they undergo in
consequence of alterations in the constitution of the
molecules, which depend upon variations of the number,
kind, or mode of arrangement, of the constituent atoms.
These atoms are not assumed to be indivisible, but merely
the finest grade of subdivision hitherto attained.
Chemistry deals with the changes in the composition and
constitution of molecules. See Atom, Molecule.
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Note: Historically, chemistry is an outgrowth of alchemy (or
alchemistry), with which it was anciently identified.
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2. An application of chemical theory and method to the
consideration of some particular subject; as, the
chemistry of iron; the chemistry of indigo.
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3. A treatise on chemistry.
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Note: This word and its derivatives were formerly written
with y, and sometimes with i, instead of e, in the
first syllable, chymistry, chymist, chymical, etc., or
chimistry, chimist, chimical, etc.; and the
pronunciation was conformed to the orthography.
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Inorganic chemistry, that which treats of inorganic or
mineral substances.
Organic chemistry, that which treats of the substances
which form the structure of organized beings and their
products, whether animal or vegetable; -- called also
chemistry of the carbon compounds. There is no
fundamental difference between organic and inorganic
chemistry.
Physiological chemistry, the chemistry of the organs and
tissues of the body, and of the various physiological
processes incident to life.
Practical chemistry, or Applied chemistry, that which
treats of the modes of manufacturing the products of
chemistry that are useful in the arts, of their
applications to economical purposes, and of the conditions
essential to their best use.
Pure chemistry, the consideration of the facts and theories
of chemistry in their purely scientific relations, without
necessary reference to their practical applications or
mere utility.
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