ISOCLINE Meaning of ISOCLINE in English ˈ ̷ ̷ ̷ ̷ˌklīn noun( -s )Etymology: is- + -cline : an anticline or syncline so closely folded that the rock beds of the two sides have the same dip Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012