You must there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary. Start your free trial today and get unlimited access to America\'s largest dictionary, with: More than 250,000 words that aren\'t in our free dictionary Expanded definitions, etymologies, and usage notes Advanced search features Ad free! Post the Definition of lucernal to Facebook Share the Definition of lucernal on Twitter Cite this EntryLucernal. Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/lucernal. Accessed 14 Aug. 2021. Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/lucernal. Accessed 14 Aug. 2021.\">MLA Merriam-Webster.com Dictionary, s.v. lucernal, accessed August 14, 2021, https://www.merriam-webster.com/dictionary/lucernal.\">Chicago Merriam-Webster.com dictionary. Retrieved August 14, 2021, from https://www.merriam-webster.com/dictionary/lucernal\">APA Merriam-Webster.com Dictionary, https://www.merriam-webster.com/dictionary/lucernal. Accessed 8/14/2021.\">Merriam-Webster Love words? Need even more definitions? Subscribe to America\'s largest dictionary and get thousands more definitions and advanced search ad free! Merriam-Webster unabridged