Longman Dictionary English From Longman Dictionary of Contemporary EnglishRelated topics: Earth sciencesPliocenePli‧o‧cene /ˈplaɪəsiːn/ adjective HEbelonging to the period in the Earth’s history that started about five million years ago and continued until about three million years agoOrigin Pliocene (1800-1900) Greek pleion “more” + kainos “recent” ldoceonline.com
