borrowed from Greek, combining form from árthron "joint, articulation," probably nominalized form of an adjective meaning "joined," going back to the Indo-European verbal base *h2er- "fit, join" + *-dhro-, adjective suffix — more at arm entry 3
“Arthro-.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/arthro-. Accessed 26 Sep. 2023.
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