unicolor

or u·ni·col·ored

[yoo-ni-kuhl-er, yoo-ni-kuhl-]
Also especially British, u·ni·col·our, u·ni·col·oured.

Origin of unicolor

First recorded in 1775–85; uni- + color
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for unicolour

unicolour

US unicolor

adjective
  1. of one colour; monochromatic
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012