| prima donna | Origin: It, fr. Primo, prima, the first + donna lady, mistress. See Prime, and Donna. The first or chief female singer in an opera. Source: Websters Dictionary (01 Mar 1998) |
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| fissura prima cerebelli | The deepest fissure of the cerebellum; demarcates the division of anterior and posterior lobes of the cerebellum; second to appear embryologically. Synonym: fissura prima cerebelli. (05 Mar 2000) |
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