"consisting of or relating to seven," c. 1600, from Latin septenarius "consisting of seven," from septeni (plural) "seven apiece, by sevens," from septem "seven" (see seven). Especially in reference to the week. As a noun, "group or set of seven," from 1590s; as "period of seven years," 1570s.
updated on May 11, 2022
Dictionary entries near septenary