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Equinox (MLM) Equinox International was a multi-level marketing organization, headed by Bill Gouldd. In the early-to-mid-1990s, Equinox was one of the fastest-growing companies in the United States. It had its headquarters in Las Vegas, Nevada.
See equinox defined for English-language learners. See equinox defined for kids. Equinox descends from aequus, the Latin word for equal, and nox, the Latin word for nightâa fitting history for a word that describes days of the year when the daytime and nighttime are equal in length.