Online Dictionary of Invertebrate Zoology. A.R. Maggenti and S.L. Gardne. 2005.
isthmiate — isth·mi·ate … English syllables
isthmiate — mēˌāt adjective Etymology: New Latin isthmiatus, from isthmi (from isthmus) + Latin atus ate : having an isthmus (sense 2) … Useful english dictionary