7 letters · 11 points in Scrabble
noun from 25 million to 13 million years ago; appearance of grazing mammals
originFrom Ancient Greek μείων (meíōn, “less”) + καινός (kainós, “new”). Coined by English polymath William Whewell in 1831 for Charles Lyell, who introduced it in 1833 in his book Principles of Geology. By surface analysis, meio- + -cene.
Etymology from Wiktionary, CC BY-SA 3.0