Meaning

noun an atoll in the Marshall Islands; formerly used by the United States as a site for testing nuclear weapons

noun a woman's very brief bathing suit

originEtymology tree Marshallese pik Marshallese ni Marshallese Pikinnibor. German Bikinibor. English Bikinibor. French Bikini French bikinibor. English bikini From French bikini, named after the place name Bikini, from English Bikini, the name of the atoll where the United States tested nuclear weapons in July 1946; it was reckoned that the bathing suit would cause as much excitement as a nuclear…

Etymology from Wiktionary, CC BY-SA 3.0