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noctambulous

or noc·tam·bu·lant

[nok-tam-byuh-luh s or nok-tam-byuh-luh nt]
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adjective
  1. of, relating to, or given to sleepwalking.
Also noc·tam·bu·lis·tic.

Origin of noctambulous

1725–35; noct- + Latin ambul(āre) to walk + -ous
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018