RACHIAL Meaning of RACHIAL in English ˈrākēəl adjectiveor ra·chid·i·al rəˈkidēəlEtymology: rachial from rachi- + -al; rachidial from New Latin rachid-, rachis + English -ial : rachidian Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012