subring

sub·ring

[suhb-ring]
noun Mathematics.
a subset of a ring that is a subgroup under addition and that is closed under multiplication. Compare ring1 ( def 22 ).

Origin:
1950–55; sub- + ring1

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Subring is always a great word to know.
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a scrap or morsel of food left at a meal.
the offspring of a zebra and a donkey.
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