undersaturatedadj.

Etymology: under- prefix¹ 5(a).Previous versions of the OED give the stress as: underˈsaturated.

a. Not saturated, falling short of being saturated; spec. (of a solution) not containing as much solute as is possible in equilibrium conditions.

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the world > matter > chemistry > physical chemistry > solutions > [adjective] > undersaturation

undersaturated1832

1832 Nat. Philos. (Libr. Useful Knowl.) II. v. ii. 13/1 In a deficiency of fluid, or in matter under-saturated [with electric fluid].

1957 G. E. Hutchinson Treat. Limnol. I. ix. 592 It appears that the surface of the lake is significantly undersaturated throughout the spring months.

1961 L. C. Martin Clin. Endocrinol. (ed. 3) ii. 56 The arterial blood is chronically under-saturated with oxygen.

1973 Sci. Amer. Jan. 105/2 When the bases of the clouds are fairly high and there is a thick layer of warm, undersaturated air below them.

b. Geology. Of a rock or magma: containing insufficient free silica (or some other specified oxide) to saturate all the bases present; consisting wholly or partly of undersaturated minerals. Of a mineral: unable to form in the presence of free silica; unsaturated.

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the world > the earth > minerals > mineral structure or appearance > [adjective] > saturated or undersaturated

oversaturated1913

saturated1913

undersaturated1913

the world > the earth > structure of the earth > constituent materials > rock > mineral or chemical composition > [adjective] > over- or under-saturated

oversaturated1913

saturated1913

undersaturated1913

1913 S. J. Shand in Geol. Mag. 5th Decade 10 510 An undersaturated magma (i.e. one which on solidifying would give rise to a partsaturated or unsaturated rock) is capable of entering into chemical combination with the silica of invaded rock masses.

1947 E. E. Wahlstrom Igneous Minerals & Rocks ix. 253 Rocks may be oversaturated, saturated, or undersaturated with respect to alumina or other oxides as well as with respect to silica.

1965 G. J. Williams Econ. Geol. N.Z. xi. 168/2 A very fine-grained phonolite or undersaturated trachyte of high soda content.

1983 D. S. Barker Igneous Rocks xi. 259 All xenoliths for which a mantle origin seems likely have been found in silica-undersaturated rocks.

This entry has not yet been fully updated (first published 1986; most recently modified version published online June 2019).

单词	undersaturated
释义	undersaturatedadj. Etymology: under- prefix¹ 5(a).Previous versions of the OED give the stress as: underˈsaturated. a. Not saturated, falling short of being saturated; spec. (of a solution) not containing as much solute as is possible in equilibrium conditions. ΘΚΠ the world > matter > chemistry > physical chemistry > solutions > [adjective] > undersaturation undersaturated1832 1832 Nat. Philos. (Libr. Useful Knowl.) II. v. ii. 13/1 In a deficiency of fluid, or in matter under-saturated [with electric fluid]. 1957 G. E. Hutchinson Treat. Limnol. I. ix. 592 It appears that the surface of the lake is significantly undersaturated throughout the spring months. 1961 L. C. Martin Clin. Endocrinol. (ed. 3) ii. 56 The arterial blood is chronically under-saturated with oxygen. 1973 Sci. Amer. Jan. 105/2 When the bases of the clouds are fairly high and there is a thick layer of warm, undersaturated air below them. b. Geology. Of a rock or magma: containing insufficient free silica (or some other specified oxide) to saturate all the bases present; consisting wholly or partly of undersaturated minerals. Of a mineral: unable to form in the presence of free silica; unsaturated. ΘΚΠ the world > the earth > minerals > mineral structure or appearance > [adjective] > saturated or undersaturated oversaturated1913 saturated1913 undersaturated1913 the world > the earth > structure of the earth > constituent materials > rock > mineral or chemical composition > [adjective] > over- or under-saturated oversaturated1913 saturated1913 undersaturated1913 1913 S. J. Shand in Geol. Mag. 5th Decade 10 510 An undersaturated magma (i.e. one which on solidifying would give rise to a partsaturated or unsaturated rock) is capable of entering into chemical combination with the silica of invaded rock masses. 1947 E. E. Wahlstrom Igneous Minerals & Rocks ix. 253 Rocks may be oversaturated, saturated, or undersaturated with respect to alumina or other oxides as well as with respect to silica. 1965 G. J. Williams Econ. Geol. N.Z. xi. 168/2 A very fine-grained phonolite or undersaturated trachyte of high soda content. 1983 D. S. Barker Igneous Rocks xi. 259 All xenoliths for which a mantle origin seems likely have been found in silica-undersaturated rocks. This entry has not yet been fully updated (first published 1986; most recently modified version published online June 2019). > as lemmas undersaturated undersaturated adj. Brit. /ˌʌndəˈsatjᵿreɪtᵻd/ , /ˌʌndəˈsatʃᵿreɪtᵻd/ , U.S. /ˌəndərˈsætʃəˌreɪdᵻd/ ΚΠ 1832 Nat. Philos. (Libr. Useful Knowl.) II. Electricity ii. §49. 13 In a deficiency of fluid, or in matter under-saturated. extracted from under-prefix¹ < adj.1832 as lemmas
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undersaturatedadj.

> as lemmas