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nycto-

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  1. variant of nyct-.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Word Origin and History for nycto-

before vowels nyct-, word-forming element meaning "night," from Latinized form of Greek nykto-, comb. form of nyx "night" (see night).

Online Etymology Dictionary, © 2010 Douglas Harper

nycto- in Medicine

nycto-

pref.
  1. Night:nyctophobia.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.