borrowed from New Latin, plural of Cheilostoma, from cheilo- cheilo- + -stoma -stoma entry 1
1852, in the meaning defined above
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“Cheilostomata.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Cheilostomata. Accessed 29 Nov. 2022.
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