guarn.
/ɡwɑː/, /ˈɡuːɑː/, U.S. /ɡwɑr/ 1. An Indian plant, Cyamopsis tetragonoloba (psoralioides), of the family Leguminosæ, which tolerates drought and is grown as a vegetable, fodder crop, and green manure, and as a source of guar gum.
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the world > plants > particular plants > cultivated or valued plants > plants yielding other vegetable materials > [noun]
agar-agar1769
wax-palm1830
jelly-plant1866
guar1882
the world > plants > particular plants > cultivated or valued plants > particular food plant or plant product > particular vegetables > [noun] > other vegetables
callaloo1696
guar1882
the world > plants > particular plants > cultivated or valued plants > particular food plant or plant product > particular fodder plants > [noun] > other fodder plants
mutter1875
munyeroo1878
guar1882
prickly comfrey1888
kudzu1893
Townsville lucerne1925
1832 W. Roxburgh et al. Flora Indica (new ed.) III. 317 Goor-chikurkai..is an annual esculent plant, much cultivated in the gardens of the natives on the coast of Coromandel.]
1882 J. F. Duthie & J. B. Fuller Field & Garden Crops II. 24 Guár is grown in these Provinces for two very different purposes,—as a vegetable for human consumption, and as a pulse for horses and cattle.
1908 G. Watt Commerc. Products India 449 Gúar is specially suitable as a green manure or green fodder crop.
1948 Chem. Industries Jan. 60/3 As a consequence of the demand for a gum such as may be obtained from guar, General Mills undertook large scale agricultural production of the plant.
1965 R. R. Agarwal Soil Fertility in India vii. 157 Cowpea (Vigna catjang), guar (Cyamopsis psoralioides)..are examples of other leguminous plants that are used as green manures.
2. Commercial guar gum.
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society > occupation and work > materials > derived or manufactured material > vegetable extracts or preparations > [noun] > guar gum
guar1945
guar flour1946
guar gum1950
1945 Paper Mill News 8 Dec. 52/1 It is intended to explore the possibilities of tub sizing with converted guar.
1952 J. P. Casey Pulp & Paper I. vii. 406 When added dry at the beater, guar acts as a strong cementing agent which greatly increases the strength of the paper.
1966 Kirk-Othmer Encycl. Chem. Technol. (ed. 2) X. 750 Guar solutions can be gelled by the addition of small amounts of borax.
Compounds
C1. attributive, as guar seed.
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1945 Sat. Evening Post 30 June (Back cover) Science has found that guar seeds contain a gum which has..dozens of important uses.
1969 Encycl. Polymer Sci. & Technol. XI. 404 Guar seeds have been the source of large quantities of industrial gum.
C2.
guar flour n. commercial guar gum.
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society > occupation and work > materials > derived or manufactured material > vegetable extracts or preparations > [noun] > guar gum
guar1945
guar flour1946
guar gum1950
1946 Progress thru Research (General Mills, Inc.) Fall 6/2 (caption) This experimental mill..produces guar flour for development research and commercial evaluation.
guar gum n. a fine greyish-white powder obtained by grinding the endosperm of guar seeds and used in the food, paper, and other industries; also, the polysaccharide that is the main constituent of this.
ΘΚΠ
society > occupation and work > materials > derived or manufactured material > vegetable extracts or preparations > [noun] > guar gum
guar1945
guar flour1946
guar gum1950
1950 Jrnl. Amer. Chem. Soc. 72 4634/1 Guar gum extracted from the endosperm of guar seed is a galactomannan polysaccharide in which the ratio of d-mannose to d-galactose is 2:1.
1959 F. Smith & R. Montgomery Chem. Plant Gums xii. 325 The polysaccharide in guar flour, as the crude, powdered gum is sometimes called, contains 84 per cent of d-mannose and 16 per cent d-galactose... The crude guar gum..may contain 1 to 5 per cent protein.
This entry has not yet been fully updated (first published 1972; most recently modified version published online March 2022).
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n.1882