(informal) McMaster University

plural of Mac

plural of MAC

(astronomy) Abbreviation of MAssive Cluster Survey. A survey for a statistically complete sample of distant (0.7>z>0.3) very X-ray luminous massive clusters of galaxies (“galaxy clusters”), culled from the ROSAT Bright Source Catalogue of X-ray sources

plural of mac

(finance, informal) The Federal Home Loan Mortgage Corporation (FHLMC), a private, stockholder-owned corporation sponsored by the US government, established in 1968 to provide market competition for the Federal National Mortgage Association.

(informal) An Apple Macintosh computer.

plural of MAC address

plural of mac salad

(Britain) A lightweight rainjacket that can be compressed into a small pocket-sized bag.