Correct spelling for the English word "aechmodus" is [ˈiːt͡ʃmɒdəs], [ˈiːtʃmɒdəs], [ˈiː_tʃ_m_ɒ_d_ə_s] (IPA phonetic alphabet).
A genus of fossil ganoid fishes having small sharp-pointed teeth.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.