The Collaborative International Dictionary of English v.0.48:
matric \matric\ n. [Shortened from matriculation.] admission to a group (especially a college or university). [slang] Syn: matriculation. [WordNet 1.5]WordNet (r) 3.0 (2006):
matric n 1: admission to a group (especially a college or university) [syn: matriculation, matric]