sporadic
Cross references: 1. infrequent spo.rad.ic \sp*-'rad-ik\ \-i-k(*-)le-\ aj [ML sporadicus, fr. Gk sporadikos, fr. sporade-n here and]there, fr. sporad-, sporas scattered; akin to Gk speirein to sow : occurring occasionally, singly, or in scattered instances : SEPARA TE, ISOLATED {~ case of disease} - spo.rad.i.cal.ly av