Any stingray of the family Dasyatidae.

Any treatment of an ore used to concentrate its valuable constituents (minerals) into products (concentrate) of smaller bulk, and simultaneously to collect the worthless material (gangue) into disc...

simple past tense and past participle of diagonalise

A village and civil parish in Epping Forest district, Essex, England (OS grid ref TQ4795). / A habitational surname from Old English.