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phlogiston
phlo·gis·ton P0250100 (flō-jĭs′tŏn′, -tən)n. A hypothetical substance formerly thought to be a volatile constituent of all combustible substances, released as flame in combustion.
[From Greek, neuter of phlogistos, inflammable, from phlogizein, to set on fire, from phlox, phlog-, flame; see bhel- in Indo-European roots.]phlogiston (flɒˈdʒɪstɒn; -tən) n (Chemistry) chem a hypothetical substance formerly thought to be present in all combustible materials and to be released during burning[C18: via New Latin from Greek, from phlogizein to set alight; related to phlegein to burn]phlo•gis•ton (floʊˈdʒɪs tɒn, -tən)
n. a nonexistent chemical that, prior to the discovery of oxygen, was thought to be released during combustion. [1720–30; < New Latin: inflammability, n. use of Greek phlogistón, neuter of phlogistós inflammable, burnt up; see phlogistic] phlo·gis·ton (flō-jĭs′tən) A colorless, odorless, weightless substance once believed to be the combustible part of all flammable substances and to be given off as flame during burning. In the 18th century, Antoine Lavoisier proved that phlogiston does not exist. See Note at Lavoisier.phlogistonObsolete Chemistry. a hypothetical ingredient thought to be released during combustion. — phlogistic, adj.See also: FireThesaurus| Noun | 1. | phlogiston - a hypothetical substance once believed to be present in all combustible materials and to be released during burningsubstance - the real physical matter of which a person or thing consists; "DNA is the substance of our genes" |
Phlogiston
Phlogiston the hypothetical principle of combustion in the view of 18th-century chemists. According to the phlogiston theory, proposed by G. E. Stahl, all flammable materials, such as wood and oils, and non-noble metals, such as copper, iron, lead, and tin, are composed of ash and phlogiston, which is released on burning or roasting. Despite its erroneousness, the phlogiston theory played a major role in the establishment of chemistry as a science; it was the first “to generalize many reactions (of oxidation), and this was already a very important step in science” (D. I. Mendeleev, Izbrannye lektsii po khimii, 1968, p. 60). The phlogiston theory was refuted by A. Lavoisier at the end of the 18th century. phlogiston
phlo·gis·ton (flō-jis'tŏn), A hypothetical substance of negative mass that, according to the theory of G.E. Stahl, was given off by a substance when it underwent combustion, thus accounting for the decrease in mass of the ash over the original substance; abandoned after the discoveries of Priestley and Lavoisier concerning oxygen. [G. phlogistos, inflammable] phlogiston
Words related to phlogistonnoun a hypothetical substance once believed to be present in all combustible materials and to be released during burningRelated Words |