oxicadj.

Brit.

/ˈɒksɪk/, U.S.

/ˈɑksɪk/

Origin: Formed within English, by derivation. Etymons: oxy- comb. form², -ic suffix.

Etymology: < oxy- comb. form² + -ic suffix. With sense 2 compare earlier anoxic adj. at anoxia n. Derivatives.

1. Soil Science. Designating a subsurface mineral soil horizon more than 30 cm thick that is characterized by the virtual absence of any weatherable materials and the presence of hydrated oxides of iron and aluminium, highly insoluble minerals such as quartz, and clays of the type in which single sheets of silica tetrahedra alternate with single sheets of alumina octahedra. Cf. Oxisol n.

ΘΚΠ

the world > the earth > structure of the earth > constituent materials > earth or soil > [adjective] > spec horizon

palaeosolic1956

andic1960

oxic1960

salic1960

spodic1960

1960 Soil Classif.: 7th Approximation (U.S. Dept. Agric.) v. 53/1 The concept of the oxic horizon presented here is very tentative, as it has had little testing... The oxic horizon is one from which weathering has..removed or altered a large part of the silica that is combined with iron and aluminium, but not necessarily the quartz or 1:1 lattice clays.

1970 P. M. Ahn W. Afr. Soils (1974) vii. 221 The boundaries of the oxic horizon are usually gradual and diffuse, and the horizon shows no rock structure or very little.

1992 Jrnl. Trop. Ecol. 8 255 A moderately well-drained clay soil..distinguished by an oxic horizon indicating extensive weathering.

2. gen. Involving, characterized by, or related to the presence of oxygen.

ΘΚΠ

the world > matter > chemistry > elements and compounds > metals > specific elements > oxygen > [adjective]

oxygeniferous1838

oxic1970

1970 Acta Radiologica: Therapy, Physics, Biol. 9 257 The investigations..were conducted with the aim of comparing the reactions of different cell lines to oxic and anoxic roentgen radiation.

1972 Radiation Bot. 12 151 The damage produced by anoxic irradiation can be enhanced by O₂, after irradiation, to give oxic damage.

1987 Nature 17 Dec. 641/1 It is hypothesized that under oxic conditions pristane is generated from phytol.

1991 R. S. K. Barnes & K. H. Mann Aquatic Ecol. (ed. 2) vi. 112/1 Declining water levels in freshwater wetlands could expose waterlogged peat to atmospheric oxygen, promoting oxic decomposition and releasing CO₂.

Derivatives

oˈxicity n. oxic condition; relative oxygen content.

ΘΚΠ

the world > matter > chemistry > elements and compounds > metals > specific elements > oxygen > [noun] > oxicity

oxicity1978

1978 Nature 16 Mar. 216/2 The oxicity/anoxicity of the sediment and the water column affects the amount and nature of the organic matter incorporated into the sediment during deposition.

1982 Science 6 Aug. 500/3 The presence of marker compounds for methanogenic..or sulfate-reducing..bacteria places oxicity constraints on sediments.

1996 Appl. & Environmental Microbiol. 62 4100 A comparison was made between the freshwater lake sediment and three soils differing in oxicity profiles.

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

单词	oxic
释义	oxicadj. Brit. /ˈɒksɪk/, U.S. /ˈɑksɪk/ Origin: Formed within English, by derivation. Etymons: oxy- comb. form², -ic suffix. Etymology: < oxy- comb. form² + -ic suffix. With sense 2 compare earlier anoxic adj. at anoxia n. Derivatives. 1. Soil Science. Designating a subsurface mineral soil horizon more than 30 cm thick that is characterized by the virtual absence of any weatherable materials and the presence of hydrated oxides of iron and aluminium, highly insoluble minerals such as quartz, and clays of the type in which single sheets of silica tetrahedra alternate with single sheets of alumina octahedra. Cf. Oxisol n. ΘΚΠ the world > the earth > structure of the earth > constituent materials > earth or soil > [adjective] > spec horizon palaeosolic1956 andic1960 oxic1960 salic1960 spodic1960 1960 Soil Classif.: 7th Approximation (U.S. Dept. Agric.) v. 53/1 The concept of the oxic horizon presented here is very tentative, as it has had little testing... The oxic horizon is one from which weathering has..removed or altered a large part of the silica that is combined with iron and aluminium, but not necessarily the quartz or 1:1 lattice clays. 1970 P. M. Ahn W. Afr. Soils (1974) vii. 221 The boundaries of the oxic horizon are usually gradual and diffuse, and the horizon shows no rock structure or very little. 1992 Jrnl. Trop. Ecol. 8 255 A moderately well-drained clay soil..distinguished by an oxic horizon indicating extensive weathering. 2. gen. Involving, characterized by, or related to the presence of oxygen. ΘΚΠ the world > matter > chemistry > elements and compounds > metals > specific elements > oxygen > [adjective] oxygeniferous1838 oxic1970 1970 Acta Radiologica: Therapy, Physics, Biol. 9 257 The investigations..were conducted with the aim of comparing the reactions of different cell lines to oxic and anoxic roentgen radiation. 1972 Radiation Bot. 12 151 The damage produced by anoxic irradiation can be enhanced by O₂, after irradiation, to give oxic damage. 1987 Nature 17 Dec. 641/1 It is hypothesized that under oxic conditions pristane is generated from phytol. 1991 R. S. K. Barnes & K. H. Mann Aquatic Ecol. (ed. 2) vi. 112/1 Declining water levels in freshwater wetlands could expose waterlogged peat to atmospheric oxygen, promoting oxic decomposition and releasing CO₂. Derivatives oˈxicity n. oxic condition; relative oxygen content. ΘΚΠ the world > matter > chemistry > elements and compounds > metals > specific elements > oxygen > [noun] > oxicity oxicity1978 1978 Nature 16 Mar. 216/2 The oxicity/anoxicity of the sediment and the water column affects the amount and nature of the organic matter incorporated into the sediment during deposition. 1982 Science 6 Aug. 500/3 The presence of marker compounds for methanogenic..or sulfate-reducing..bacteria places oxicity constraints on sediments. 1996 Appl. & Environmental Microbiol. 62 4100 A comparison was made between the freshwater lake sediment and three soils differing in oxicity profiles. This entry has been updated (OED Third Edition, March 2005; most recently modified version published online March 2022). < adj.1960
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