microthermaladj.

Brit.

/ˌmʌɪkrə(ʊ)ˈθəːml/, U.S.

/ˌmaɪkroʊˈθərm(ə)l/,

/ˌmaɪkrəˈθərm(ə)l/

Origin: Formed within English, by compounding. Etymons: micro- comb. form, thermal adj.

Etymology: < micro- comb. form + thermal adj. In sense 1 after microtherm n.

Ecology.

1. Designating a plant that can grow or survive in low temperatures; = microtherm adj. rare. Perhaps Obsolete.

ΘΚΠ

the world > plants > by habitat or distribution > [adjective] > that grow in cold environments or at high altitude

uplandish1545

upland1639

alpestrine1787

alpestral1852

nival1884

microthermal1901

microthermic1903

microtherm1964

1901 Bull. Torrey Bot. Club 28 393 In cold countries there is a corresponding form of vegetation..; these are microthermal plants.

2. Science. Of, relating to, or involving small quantities of heat.

ΚΠ

1929 Bull. Amer. Assoc. Petroleum Geologists 13 828 The microthermal tests constitute the first part [of the plan of study].

1935 Proc. Royal Soc. A. 152 137 The amount of HD formed during the reaction was estimated by means of the micro-thermal conductivity.

1953 Proc. Royal Soc. A. 220 137 Analysis of mixtures of ortho-hydrogen and para-hydrogen and of hydrogen, deuterium, and hydrogen deuteride..were carried out in a hot-wire micro-thermal conductivity gauge.

1963 Science 578/2 (advt.) The Ficklen Micro-thermal Precipitator.

1993 Proc. National Acad. Sci. U.S.A. 90 2995 The temperature was measured by inserting a microthermal resistor into a filled cuvette in a second water-jacketted cuvette holder.

3. Of a climate: cool temperate; characterized by cold winters and short summers. Of an organism: inhabiting such an environment.

ΚΠ

1931 C. W. Thornthwaite in Geogr. Rev. 21 646 On the basis of temperature efficiency summation six temperature provinces were defined. They are as follows..Tropical..Mesothermal..Microthermal..Taiga..Tundra..Frost.

1935 Sci. Monthly Jan. 40/1 Microthermal Climates (D—Climates of Köppen): These are the cool temperate climates.

1973 Nature 12 Oct. 311/2 The climate is cool and microthermal, with mean temperatures near sea level ranging from 1°C during the coldest months to 8°C during the warmest.

1989 Encycl. Brit. XXVI. 893/1 Microthermal [river] regimes, which are influenced by snow cover, include winter minima and summer maxima resulting from snowmelt and convectional rain.

1994 Amer. Jrnl. Bot. 81 1158/1 The Neogene microthermal flora was largely derived from the preceding flora of that area.

This is a new entry (OED Third Edition, December 2001; most recently modified version published online March 2022).

单词	microthermal
释义	microthermaladj. Brit. /ˌmʌɪkrə(ʊ)ˈθəːml/, U.S. /ˌmaɪkroʊˈθərm(ə)l/, /ˌmaɪkrəˈθərm(ə)l/ Origin: Formed within English, by compounding. Etymons: micro- comb. form, thermal adj. Etymology: < micro- comb. form + thermal adj. In sense 1 after microtherm n. Ecology. 1. Designating a plant that can grow or survive in low temperatures; = microtherm adj. rare. Perhaps Obsolete. ΘΚΠ the world > plants > by habitat or distribution > [adjective] > that grow in cold environments or at high altitude uplandish1545 upland1639 alpestrine1787 alpestral1852 nival1884 microthermal1901 microthermic1903 microtherm1964 1901 Bull. Torrey Bot. Club 28 393 In cold countries there is a corresponding form of vegetation..; these are microthermal plants. 2. Science. Of, relating to, or involving small quantities of heat. ΚΠ 1929 Bull. Amer. Assoc. Petroleum Geologists 13 828 The microthermal tests constitute the first part [of the plan of study]. 1935 Proc. Royal Soc. A. 152 137 The amount of HD formed during the reaction was estimated by means of the micro-thermal conductivity. 1953 Proc. Royal Soc. A. 220 137 Analysis of mixtures of ortho-hydrogen and para-hydrogen and of hydrogen, deuterium, and hydrogen deuteride..were carried out in a hot-wire micro-thermal conductivity gauge. 1963 Science 578/2 (advt.) The Ficklen Micro-thermal Precipitator. 1993 Proc. National Acad. Sci. U.S.A. 90 2995 The temperature was measured by inserting a microthermal resistor into a filled cuvette in a second water-jacketted cuvette holder. 3. Of a climate: cool temperate; characterized by cold winters and short summers. Of an organism: inhabiting such an environment. ΚΠ 1931 C. W. Thornthwaite in Geogr. Rev. 21 646 On the basis of temperature efficiency summation six temperature provinces were defined. They are as follows..Tropical..Mesothermal..Microthermal..Taiga..Tundra..Frost. 1935 Sci. Monthly Jan. 40/1 Microthermal Climates (D—Climates of Köppen): These are the cool temperate climates. 1973 Nature 12 Oct. 311/2 The climate is cool and microthermal, with mean temperatures near sea level ranging from 1°C during the coldest months to 8°C during the warmest. 1989 Encycl. Brit. XXVI. 893/1 Microthermal [river] regimes, which are influenced by snow cover, include winter minima and summer maxima resulting from snowmelt and convectional rain. 1994 Amer. Jrnl. Bot. 81 1158/1 The Neogene microthermal flora was largely derived from the preceding flora of that area. This is a new entry (OED Third Edition, December 2001; most recently modified version published online March 2022). < adj.1901
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