[spo.rad.ic] adj [ML sporadicus, fr. Gk sporadikos, fr. sporaden here and there, fr. sporad-, sporas scattered; akin to Gk speirein to sow--more at sperm] (ca. 1689): occurring occasionally, singly, or in scattered instances syn see infrequent -- spo.rad.i.cal.ly adv
SPORADIC
Meaning of SPORADIC in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012