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What (who) is grain-long signature - definition
ALIGNMENT AND TEXTURE OF THE FIBRES IN WOOD
Grain (wood); Woodgrain; End grain; Endgrain; Short grain; Long grain; Wood-grain
![fiddleback]] figure](https://commons.wikimedia.org/wiki/Special:FilePath/MountainAshFloor.jpg?width=200 "fiddleback]] figure")
![Sketch of A—[[Quarter-sawn]] & B—flat-sawn](https://commons.wikimedia.org/wiki/Special:FilePath/Plain quarter sawn.png?width=200 "Sketch of A—[[Quarter-sawn]] & B—flat-sawn")
Metric signature
MATHEMATICAL CONCEPT
Signature change; Signature (physics); Euclidean signature; +---; -+++; Lorentz signature; Mostly Plus; Mostly Minus; Signature of the metric
In mathematics, the signature of a metric tensor g (or equivalently, a real quadratic form thought of as a real symmetric bilinear form on a finite-dimensional vector space) is the number (counted with multiplicity) of positive, negative and zero eigenvalues of the real symmetric matrix of the metric tensor with respect to a basis. In relativistic physics, the v represents the time or virtual dimension, and the p for the space and physical dimension.
GRAIN
![Rapeseed]]](https://commons.wikimedia.org/wiki/Special:FilePath/Canola.jpg?width=200 "Rapeseed]]")
![[[Cereal]] grain seeds clockwise from top-left: [[wheat]], [[spelt]], [[oat]], [[barley]].](https://commons.wikimedia.org/wiki/Special:FilePath/Dinrêyes.jpg?width=200 "[[Cereal]] grain seeds clockwise from top-left: [[wheat]], [[spelt]], [[oat]], [[barley]].")
![[[Buckwheat]]](https://commons.wikimedia.org/wiki/Special:FilePath/Fagopyrum гречка.jpg?width=200 "[[Buckwheat]]")
![[[Barley]]](https://commons.wikimedia.org/wiki/Special:FilePath/Gerstenkoerner.jpg?width=200 "[[Barley]]")
![[[Lentil]]](https://commons.wikimedia.org/wiki/Special:FilePath/Lens culinaris seeds.jpg?width=200 "[[Lentil]]")
![Rice grains by the [[IRRI]]](https://commons.wikimedia.org/wiki/Special:FilePath/Rice grains (IRRI).jpg?width=200 "Rice grains by the [[IRRI]]")
![[[Sunflower seed]]s](https://commons.wikimedia.org/wiki/Special:FilePath/Sunflowers seeds.jpg?width=200 "[[Sunflower seed]]s")
SMALL, HARD, DRY SEED USED AS FOOD; MAY BE GROUND INTO FLOUR
Grains; Grains (agronomic); Food grains; Organic grain; Food grain; Grain farming
A pictorial query language.
["Pictorial Information Systems", S.K. Chang et al eds,
Springer 1980 ].
(1995-01-23)
grain
SMALL, HARD, DRY SEED USED AS FOOD; MAY BE GROUND INTO FLOUR
Grains; Grains (agronomic); Food grains; Organic grain; Food grain; Grain farming
¦ noun
1. wheat or other cultivated cereal used as food.
a single seed or fruit of a cereal.
2. a small, hard particle of a substance such as sand.
a discrete particle or crystal in a metal, igneous rock, etc.
3. the smallest unit of weight in the troy and avoirdupois systems, equal to 1/5760 of a pound troy and 1/7000 of a pound avoirdupois (approximately 0.0648 grams).
the smallest possible amount: there wasn't a grain of truth in what he said.
4. the longitudinal arrangement of fibres in wood, paper, etc.
the texture of wood, stone, etc.
5. the rough or wrinkled outer surface of leather.
6. a grainy appearance of a photograph or negative.
7. historical kermes or cochineal, or dye made from either of these.
¦ verb
1. give a rough surface or texture to.
2. form into grains.
3. [usu. as noun graining] paint in imitation of the grain of wood or marble.
4. remove hair from (a hide).
Phrases
against the grain contrary to one's nature or instinct.
Derivatives
-grained adjective
grainer noun
grainless adjective
Origin
ME: from OFr. grain, from L. granum; sense 3 arose because the weight was orig. equivalent to that of a grain of wheat.
Wikipedia
Wood grain
Wood grain is the longitudinal arrangement of wood fibers or the pattern resulting from such an arrangement.
