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Longman Dictionary of Contemporary English
pink-collar
adjective
EXAMPLES FROM OTHER ENTRIES
pink-collar jobs
pink-collar workers
Douglas Harper's Etymology Dictionary
pink-collar

in reference to jobs generally held by women, 1977, from pink (adj.), considered a characteristically feminine color, + collar (n.).

Wiktionary
pink-collar

a. Of or pertaining to employees in predominately female service industry.

WordNet
pink-collar

adj. of or relating to a class of jobs once traditionally filled by women; "a pink-collar employee"