The term, which is rarely in use these days, refers specifically to a female student at a co-educational institution such as a college or university with both male and female students.
"Female students, as early women cheerleaders, with their male cohorts at UW Madison, c. 1956, February 10, 2004" by uwdigitalcollections is licensed under CC BY.
A06 People of Darkness (03-06) p. 94
Merriam-Webster Online 2015 Coed. http://www.learnersdictionary.com/definition/coed, accessed March 2, 2015.
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