Petri dish Petri dish A Petri dish (sometimes spelled "Petrie Dish" and alternatively known as a Petri plate or cell-culture dish), named after the German bacteriologist Julius Richard Petri, is a shallow cylindrical glass or plastic lidded dish that biologists use to culture cellssuch as bacteriaor small mosses. Modern Petri dishes usually feature rings and/or slots on their lids and bases so that when stacked, they are less prone to sliding off one another. Multiple dishes can also be incorporated into one plastic container to create a "multi-well plate". While glass Petri dishes may be reused after sterilization (via an autoclave at
Missorium of Theodosius I large dish or shallow bowl that could be used in ceremonial washing of hands and face in both secular and pagan and Christian religious contexts, though this dish is too flat to be very useful for this, and was probably intended mainly to be displayed as a sign of wealth and imperial favour. The term now tends to be avoided by scholars, as rather imprecise, but has become traditional in the case of the dish in Madrid. This is made of solid silver and has traces of gilding on the inscriptions. Its size is exceptional compared to other contemporary silver