Merriam-Webster Collegiate Dictionary - corpus

 noun  (plural corpora)  Etymology: Middle English, from Latin  Date: 15th century  1. the body of a human or animal especially when dead  2.  a. the main part or body of a bodily structure or organ the ~ of the uterus  b. the main body or corporeal substance of a thing; specifically the principal of a fund or estate as distinct from income or interest  3.  a. all the writings or works of a particular kind or on a particular subject; especially the complete works of an author  b. a collection or body of knowledge or evidence; especially a collection of recorded utterances used as a basis for the descriptive analysis of a language