megafaunaWiktionary 原文英美构词拆解megamega-前缀faunafauna词干mega-(originally) Very large, great. · In the International System of Units and other metric systems of units, multiplying the unit to which it is attached by one million (106).词源说明From mega- + fauna.释义名词noun1The large animals of a given region or time, considered as a group.2A treatise on such a group of large animals.同族词派生词 2megafaunal·charismatic megafauna