vermian Syllabification: (ver·mi·an)Pronunciation: /ˈvərmēən/Definition of vermian adjective 1 literary relating to or resembling a worm; wormlike. 2 Anatomy of or relating to the vermis of the brain. Origin: late 19th century: from Latin vermis 'worm' + -ianvermian in other Oxford dictionaries Definition of vermian in the British & World English dictionary