Entry 1 sense Webster, 1913 Pantastomata /(păn`tȧ*stŏm"ȧ*tȧ)/ · Pan·ta·stom·a·ta · IPA 01 n. pl. One of the divisions of Flagellata, including the monads and allied forms. 1. One of the divisions of Flagellata, including the monads and allied forms.(Zool.)