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Possible definitions for crf

crab
Any of 4,500 species of short-tailed decapod, found in all oceans, in freshwater, and on land. Its carapace (upper body shield) is usually broad, and its first pair of legs is modified into pincers. Most crabs live in the sea and breathe through gills, which in land crabs are modified to serve as lungs. They walk or crawl, generally with a sideways gait; some are good swimmers. Crabs are omnivorous scavengers, but many are predatory and some are herbivorous. Two of the largest known crustaceans are the giant crab of Japan (13 ft, or 4 m, from claw tip to claw tip), a spider crab; and the Tasmanian crab (up to 18 in., or 46 cm, long, and weighing more than 20 lbs, or 9 kg). Other species are less than an inch long. Well-known crabs include the hermit crab, edible crab (Britain and Europe), blue crab, Dungeness crab, fiddler crab, and king crab.


Cree
One of the major Algonquian-speaking Indian peoples of Canada, formerly occupying an immense area from W Quebec to E Alberta. They acquired firearms and engaged in the fur trade with Europeans beginning in the 17th cent. There were two major divisions: the Woodland Cree, whose culture was essentially an Eastern Woodlands type, and the Plains Cree, bison hunters of the N Great Plains. Social organization in both groups was based on local bands. Among the Woodland Cree, rituals and taboos relating to the spirits of game animals were pervasive, as was fear of witchcraft. Among the more militant Plains Cree, rites intended to foster success in the bison hunt and warfare were common. Today over 100,000 Cree live in scattered communities in Canada.


crop
In agriculture, a plant or plant product that can be grown and harvested extensively for profit or subsistence. By use, crops fall into six categories: food crops, for human consumption (e.g., wheat, potatoes); feed crops, for livestock consumption (e.g., oats, alfalfa); fiber crops, for cordage and textiles (e.g., cotton, hemp); oil crops, for consumption or industrial uses (e.g., cottonseed, corn); ornamental crops, for landscape gardening (e.g., dogwood, azalea); and industrial and secondary crops, for various personal and industrial uses (e.g., rubber, tobacco).


crow
Any of more than 20 species of black songbirds in the genus Corvus (family Corvidae) that are smaller than most ravens and less heavily billed. They are named for the sound of their call. Common crows are found in N. America and Eurasia. They eat grain, berries, insects, carrion, and the eggs of other birds. Crows may damage grain crops, but they also eat many economically harmful insects. At times crows roost together in the tens of thousands, but most species do not nest in colonies. The crows are considered the most intelligent of all birds, and pet crows can be taught to imitate speech.

Plains Indian people of Siouan language stock, historically affiliated with the Hidatsa. They occupied the area around the ...

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