n. (pl. moduli /-laiD Math. constant factor or ratio. [Latin, = measure: related to moue] modus operandi imaudas ,npa’r&nrh/ a (pl. modi operandi /,maodr/) method of working. [Latin, = way of operating] modus vivendi /Anodes vf vendi/ n. (pl. modi vivendi tmaudO) 1 way of living or coping. 2 arrangement between people who agree to differ. [Latin, = way of living]