neoammoniteWiktionary 原文英美构词拆解neoneo-前缀ammoniteammonite词干neo-Combining form of new. · contemporary词源说明From neo- + ammonite.释义名词noun1Any ammonite (†Ammonoidea) of the Jurassic period, descended from Psiloceras, the sole surviving ammonite genus of the Triassic–Jurassic extinction event.