ultrared

[ uhl-truh-red ]
/ ˌʌl trəˈrɛd /

noun

(not in technical use) infrared.

Origin of ultrared

First recorded in 1865–70; ultra- + red1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for ultrared

ultrared

/ (ˌʌltrəˈrɛd) /

adjective

an obsolete word for infrared

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