The Collaborative International Dictionary
Polygastrica
Polygastrica \Pol`y*gas"tri*ca\ (-tr[i^]*k[.a]), n. pl. [NL. So called because they were supposed to have several stomachs, or digestive cavities.] (Zo["o]l.) The Infusoria. [Obs.]
Wiktionary
polygastrica
n. (context zoology English) The infusoria.