Petri dish [SEP] named after
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-
often named after their designers (e.g. Petri dish, Erlenmeyer flask). Pencils are always used to point at key elements of the experiments, as the 'scientists' do not speak: this is sometimes taken to ridiculous levels—pointing out pencils using a pencil; pointing at chocolates and then at a person to show they are a gift. Also, the series repeatedly instructs viewers to keep a notebook, described as a "copy book," and to inscribe random and essentially worthless details of the lessons taking place with