sitcom (n.) Look up sitcom at Dictionary.com
1964, from sit(uation) com(edy), a phrase first attested 1953 (in a "TV Guide" article, with reference to "I Love Lucy").
Even Bing Crosby has succumbed to series TV and will appear in a sitcom as an electrical engineer who happens to break into song once a week. ["Life," Sept. 18, 1964]