ペトリ皿ざらペトリざらMeanings1nounPetri dishA shallow cylindrical glass or plastic lidded dish used in biology laboratories for culturing cells.See also: シャーレ実じっ験けんでは、ペトリ皿ざらに寒かん天てん培ばい地ちを入いれて細さい菌きんを培ばい養ようした。In the experiment, we put agar medium in a Petri dish and cultured bacteria.