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• a grain of sand or salt; see grain size for granule
• a grain is a type of simple dry fruit technically called a caryopsis. In agriculture, such crops are often called cereals (grain can also refer to other types of seeds, though this is technically less correct).
• in materials science (especially metallurgy), a grain is a single crystal inside solid-state matter, also referred to as crystallite
• a very small unit of mass called a grain
• the fineness of resolution for photographic film (i.e., graininess of a picture)
• woodThis article describes the wood that comprises trees and boards. For the Chinese element, see wood (classical element). For the town, see Wood, South Dakota or Wood, Wisconsin. For the type of golf club, see golf club (equipment). Veluwe, The Netherlands-grain, and as a description of personality or style from wood-working (i.e. going against the grain)
• also granule, from the diminutive of Latin granum, meaning "grain".
• Granules are short-lived concection cell structures on the visible surface of the SunThe Sun (also called Sol is the star in our solar system. Planet Earth orbits the Sun. Other bodies that orbit the Sun include other planets, asteroids, meteoroids, comets and dust. Not all objects passing through the solar system have been orbitally capt.
• There is also an Isle of GrainThe Isle of Grain (OE Greon meaning gravel) is in north Kent, England at the eastern end of the Hoo peninsula. The Isle, even today in the northern part, is almost all marshland the Grain Marshes and is an important habitat for birdlife. In earlier times in KentThis article is about the English county of Kent. See also Kent (disambiguation). Kent is a county in England, south-east of London. The county town is Maidstone. Kent has land borders with East Sussex, Surrey and Greater London, and a defined boundary wi, EnglandEngland is the largest, the most populous, and the most densely populated of the four " Home Nations" which make up the United Kingdom of Great Britain and Northern Ireland (UK). Occupying the south-eastern portion of the island of Great Britain, England, on which lies the village of Grain .
• One of the stocks in the game Stock TickerStock Ticker is a now out of print board game that was popular upon its release and is still payed today. It was released by Copp-Clark Publishing, a venerable Canadian publisher. The game has six stocks, which in fact are commodities. These six are gold,
• in golfThis article is about the sport of golf. For other meanings, see Golf (disambiguation). Golf is an outdoor game where individual players or teams play a small ball into a hole using various clubs. It is defined in the Rules of Golf as playing a ball with, the direction in which individual blades of grassIn popular language grass means a short, green, ground covering or lawn usually, but not necessarily comprised of a "true grass" or grasses, called turf. See also pasture, grass (material . In botany, grass refers to plants of the family Poaceae. These ar, usually in reference to a putting green

However, it also means the piece of propellant of a solid rocket, more or less a hollow cylinder, sometimes very large.