curricular (adj.)youdaoicibaDictYouDict[curricular 词源字典]
1798, "pertaining to driving carriages;" from Latin curriculum (see curriculum) + -ar.[curricular etymology, curricular origin, 英语词源]
extra-curricular (adj.)youdaoicibaDictYouDict
also extracurricular, 1911, from extra- + curricular. As a noun by 1957.