met·a·math·e·mat·ics 
(mĕt′ə-măth′ə-mătĭks)
(mĕt′ə-măth′ə-mătĭks)n. (used with a sing. verb)
The branch of mathematics that deals with the logic and consistency of mathematical proofs, formulas, and equations.
met′a·math′e·mati·cal adj.
met′a·math′e·ma·tician (-mə-tĭshən) n.