An oval area where racehorses are walked.

Any of various satyrine butterflies of the genus Ypthima, having circular markings on the wings.

Any of various satyrine butterflies of the genus Ypthima, having circular markings on the wings.

(entomology) Any of various satyrine butterflies of the genus Ypthima, having circular markings on the wings.

The Asian butterfly Ypthima fasciata, family Nymphalidae, having circular markings on the wings.

plural of ring-man

Synonym of septum piercing.

A disease of potatoes caused by the bacterium Clavibacter michiganensis.

(algebra) A function from one ring to another one which preserves the structure of the additive operation, the structure of the multiplicative operation, the zero element (additive identity), and, if there is one, the unity element (multiplicative identity).

(algebra) A ring homomorphism which is also a bijection.