Etymology of the English word canonical
the English word canonical
derived from the Medieval Latin word canonicalis (canonical, by canons, legal)
derived from the Latin word canonicus (canon; member of cathedral canonry; clergyman; canonical, by canons, legal; mathematician, theorist; one who constructs mathematical; regular; secular; by math divisions of monochord)
derived from the Latin word canon (canon, ecclesiastical title; member of canonry; canon, norm, rule; catalog of sacred writings admitted by rule, the_Canon; cannon; sounding-board, channel of water organ; model)
derived from the Greek word kanon, κανών (a rule ('canon'); a standard (of faith and practice); by implication, a boundary; a sphere (of activity))