trypanosomoid form trypomastigote Any of the bodies representing the morphologic (trypanosomal) stage in the life cycle of certain trypanosomatid protozoa, resembling the typical adult form of members of the genus Trypanosoma, in which the slender elongate cell has a kinetoplast and basal body located at the posterior end and a flagellum running anteriorly along an undulating membrane to become a free-flowing structure. BTO:0001398 BrendaTissueOBO