(comparative more underluminous, superlative most underluminous)
under- + luminous
"underluminous." YourDictionary, n.d. Web. 23 October 2018. <https://www.yourdictionary.com/underluminous>.
underluminous. (n.d.). Retrieved October 23rd, 2018, from https://www.yourdictionary.com/underluminous
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