plural of ring doughnut

A doughnut with a hole in the middle, formed in the shape of a ring.

(algebra) A ring obtained by adjoining a non-real complex pᵗʰ root of unity (where p is a prime number) to the ring of integers.

(algebra) A ring whose elements are fractions whose numerators belong to a given commutative unital ring and whose denominators belong to a multiplicatively closed unital subset D of that given ring. Addition and multiplication of such fractions is defined just as for a field of fractions. A pair of fractions a/b and c/d are deemed equivalent if there is a member x of D such that x(ad-bc)=0.

Third-person singular simple present indicative form of ring-fence

present participle of ring-fence

simple past tense and past participle of ring-fence

plural of ringed kingfisher

A species of bird, Megaceryle torquata, found in the Americas south of the Rio Grande Valley to Tierra del Fuego.

An area at a racecourse in which bookmakers take bets from punters.