trithoriumWiktionary 原文英美构词拆解tritri-前缀thoriumthorium词干tri-Three. · (chemistry) Used for the digit three to form systematic element names of elements whose existence has been predicted, and which have not yet been given a trivial name.词源说明From tri- + thorium.释义名词noun1(chemistry, in combination) Three thorium atoms or cations in a molecule (Th3)