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polyphasic

[pol-ee-fey-zik]
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adjective
  1. having more than two phases.
  2. habitually doing more than one thing at a time: a polyphasic personality.

Origin of polyphasic

First recorded in 1920–25; polyphase + -ic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018