erratic
noun/ɪˈrætɪk/
/ɪˈrætɪk/
(also erratic block, erratic boulder)
(geology)- a large rock that is different from the rock around it and was left behind when a large mass of ice meltedWord Originlate Middle English: from Old French erratique, from Latin erraticus, from errare ‘to stray, err’.
Definitions on the go
Look up any word in the dictionary offline, anytime, anywhere with the Oxford Advanced Learner’s Dictionary app.
Check pronunciation:
erratic