In abstract algebra, a semiring is an algebraic structure similar to a ring, but without the requirement that each element must have an additive inverse. The term rig is also used occasionally — this originated as a joke, suggesting that rigs are rings without negative elements. == Definition == A semiring is a set R equipped with two binary ope...
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• (n.) One of the incomplete rings of the upper part of the bronchial tubes of most birds. The semerings form an essential part of the syrinx, or musical organ, of singing birds.
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Sem'i·ring` noun (Anat.) One of the incomplete rings of the upper part of the bronchial tubes of most birds. The semerings form an essential part of the syrinx, or musical organ, of singing birds.
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http://www.encyclo.co.uk/webster/S/65
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