pentatomicadj.

Brit.

/ˌpɛntəˈtɒmɪk/, U.S.

/ˌpɛn(t)əˈtɑmɪk/

Forms: 1800s– pentatomic, 1900s– penta-atomic.

Origin: Formed within English, by compounding. Etymons: penta- comb. form, atomic adj.

Etymology: < penta- comb. form + atomic adj. Compare earlier monatomic adj., and slightly later diatomic adj., triatomic adj., tetratomic adj.

Chemistry.

Consisting of five atoms; containing five atoms per molecule. Also: pentabasic, pentahydric (now rare); †pentavalent (obsolete).

ΘΚΠ

the world > matter > chemistry > valency > [adjective] > having a valency of five

pentatomic1858

pentavalent1866

quinquevalent1866

the world > matter > chemistry > atomic chemistry > [adjective] > relating to molecules > by number of atoms

monatomic1848

pentatomic1858

ter-atomic1861

tetratomic1862

triatomic1862

diatomic1866

hexatomic1868

octatomic1875

heptatomic1886

monadic1907

1858 H. Watts & R. Bridges Graham's Elem. Inorg. Chem. (ed. 2) 707 The arsenic being triatomic in the former, and pentatomic in the latter.

1868 H. B. Jones & H. Watts Fownes's Man. Elem. Chem. (ed. 10) 672 Glucoses may..be expected to act as pentatomic alcohols.

1873 J. P. Cooke New Chem. (1874) xii. 284 No definite pentatomic hydrate is known.

1938 Proc. Royal Soc. A. 167 562 The complete potential energy expression for a pentatomic molecule requires nine force constants for its specification.

1967 Science 4 Aug. 536/2 Chapter 9 [deals] with penta-atomic radicals.

1995 Jrnl. Medicinal Chem. 38 803/2 The presence of a ketocarbonyl group in the aliphatic chain connecting these pentatomic heterocycles.

This entry has been updated (OED Third Edition, September 2005; most recently modified version published online March 2022).

单词	pentatomic
释义	pentatomicadj. Brit. /ˌpɛntəˈtɒmɪk/, U.S. /ˌpɛn(t)əˈtɑmɪk/ Forms: 1800s– pentatomic, 1900s– penta-atomic. Origin: Formed within English, by compounding. Etymons: penta- comb. form, atomic adj. Etymology: < penta- comb. form + atomic adj. Compare earlier monatomic adj., and slightly later diatomic adj., triatomic adj., tetratomic adj. Chemistry. Consisting of five atoms; containing five atoms per molecule. Also: pentabasic, pentahydric (now rare); †pentavalent (obsolete). ΘΚΠ the world > matter > chemistry > valency > [adjective] > having a valency of five pentatomic1858 pentavalent1866 quinquevalent1866 the world > matter > chemistry > atomic chemistry > [adjective] > relating to molecules > by number of atoms monatomic1848 pentatomic1858 ter-atomic1861 tetratomic1862 triatomic1862 diatomic1866 hexatomic1868 octatomic1875 heptatomic1886 monadic1907 1858 H. Watts & R. Bridges Graham's Elem. Inorg. Chem. (ed. 2) 707 The arsenic being triatomic in the former, and pentatomic in the latter. 1868 H. B. Jones & H. Watts Fownes's Man. Elem. Chem. (ed. 10) 672 Glucoses may..be expected to act as pentatomic alcohols. 1873 J. P. Cooke New Chem. (1874) xii. 284 No definite pentatomic hydrate is known. 1938 Proc. Royal Soc. A. 167 562 The complete potential energy expression for a pentatomic molecule requires nine force constants for its specification. 1967 Science 4 Aug. 536/2 Chapter 9 [deals] with penta-atomic radicals. 1995 Jrnl. Medicinal Chem. 38 803/2 The presence of a ketocarbonyl group in the aliphatic chain connecting these pentatomic heterocycles. This entry has been updated (OED Third Edition, September 2005; most recently modified version published online March 2022). < adj.1858
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