subdwarfn.

Brit.

/ˈsʌbdwɔːf/, U.S.

/ˈsəbˌd(w)ɔrf/

Inflections: Plural subdwarfs, (rare) subdwarves.

Origin: Formed within English, by derivation. Etymons: sub- prefix, dwarf n.

Etymology: < sub- prefix + dwarf n.

1. A tree, esp. a cultivar, that is smaller than a size regarded as dwarf. Cf. dwarf n. 2a. rare.

ΘΚΠ

the world > plants > appearance of plant > defined by size or stature > [noun] > small or large plant

dwarf1593

plantleta1711

subdwarf1902

tall1909

1902 Bull. Natal Dept. Agric. xix. 261 Its growth is very poor as compared with C. leptoclada, its general appearance similar, so except as a sub-dwarf it has no qualification.

1989 119th Ann. Rep. Secretary State Hort. Soc. Michigan 112 The Subdwarf classification is for trees 4-6 feet tall or 15-20% the size of rootstocks in the Vigorous grouping.]

2000 Morning Star (Wilmington, N. Carolina) 31 Aug. 5 This is a long time ago before these new sub-dwarf grafts were available that you can buy to grow in containers.

2. Astronomy. A star which lies just below the main sequence on the Hertzsprung–Russell diagram, being less luminous than main sequence stars of the same temperature or spectral type. Also subdwarf star. Cf. dwarf n. 2c, subgiant n.

ΘΚΠ

the world > the universe > star > kind of star > small star > [noun] > subdwarf

subdwarf1939

1939 G. P. Kuiper in Astrophysical Jrnl. 89 548 Three classes of objects of special interest are expected to be found..: (1) white dwarfs; (2) intermediate white dwarfs or, more generally, stars not over 2 or 3 mag. below the main sequence... The second group extends almost along the whole main sequence. Since these stars merge into the main sequence and are much more similar to main-sequence stars than to white dwarfs.., the name ‘subdwarfs’ is suggested for this class of stars, in analogy with ‘subgiants’.

1961 Sci. News Let. 21 Oct. 272/2 Subdwarf stars may have planets far beyond the limits of the ecosphere.

1962 New Scientist 3 May 218/2 Some hot subdwarfs are found from their spectra to have helium but virtually no hydrogen.

1981 Nature 8 Oct. 432/2 The most likely explanation..is that the atmospheres are untypical of the subdwarf stars as a whole.

2005 I. N. Reid & S. L. Hawley New Light Dark Stars (ed. 2) ii. 77 The latest subdwarfs are redder than disk dwarfs with similar absolute magnitudes.

This entry has been updated (OED Third Edition, June 2012; most recently modified version published online March 2022).

单词	subdwarf
释义	subdwarfn. Brit. /ˈsʌbdwɔːf/, U.S. /ˈsəbˌd(w)ɔrf/ Inflections: Plural subdwarfs, (rare) subdwarves. Origin: Formed within English, by derivation. Etymons: sub- prefix, dwarf n. Etymology: < sub- prefix + dwarf n. 1. A tree, esp. a cultivar, that is smaller than a size regarded as dwarf. Cf. dwarf n. 2a. rare. ΘΚΠ the world > plants > appearance of plant > defined by size or stature > [noun] > small or large plant dwarf1593 plantleta1711 subdwarf1902 tall1909 1902 Bull. Natal Dept. Agric. xix. 261 Its growth is very poor as compared with C. leptoclada, its general appearance similar, so except as a sub-dwarf it has no qualification. 1989 119th Ann. Rep. Secretary State Hort. Soc. Michigan 112 The Subdwarf classification is for trees 4-6 feet tall or 15-20% the size of rootstocks in the Vigorous grouping.] 2000 Morning Star (Wilmington, N. Carolina) 31 Aug. 5 This is a long time ago before these new sub-dwarf grafts were available that you can buy to grow in containers. 2. Astronomy. A star which lies just below the main sequence on the Hertzsprung–Russell diagram, being less luminous than main sequence stars of the same temperature or spectral type. Also subdwarf star. Cf. dwarf n. 2c, subgiant n. ΘΚΠ the world > the universe > star > kind of star > small star > [noun] > subdwarf subdwarf1939 1939 G. P. Kuiper in Astrophysical Jrnl. 89 548 Three classes of objects of special interest are expected to be found..: (1) white dwarfs; (2) intermediate white dwarfs or, more generally, stars not over 2 or 3 mag. below the main sequence... The second group extends almost along the whole main sequence. Since these stars merge into the main sequence and are much more similar to main-sequence stars than to white dwarfs.., the name ‘subdwarfs’ is suggested for this class of stars, in analogy with ‘subgiants’. 1961 Sci. News Let. 21 Oct. 272/2 Subdwarf stars may have planets far beyond the limits of the ecosphere. 1962 New Scientist 3 May 218/2 Some hot subdwarfs are found from their spectra to have helium but virtually no hydrogen. 1981 Nature 8 Oct. 432/2 The most likely explanation..is that the atmospheres are untypical of the subdwarf stars as a whole. 2005 I. N. Reid & S. L. Hawley New Light Dark Stars (ed. 2) ii. 77 The latest subdwarfs are redder than disk dwarfs with similar absolute magnitudes. This entry has been updated (OED Third Edition, June 2012; most recently modified version published online March 2022). < n.1902
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