One of a series of doors at a train or subway station, at the edge of a platform, that prevent access beyond the platform when there is no train to be boarded

(biology) A screening technique for the rapid detection of recombinant bacteria in vector-based molecular cloning experiments. DNA of interest is ligated into a vector, which is then inserted into a host cell; these are grown in the presence of X-gal. Cells transformed with vectors containing recombinant DNA will produce white colonies; cells transformed with non-recombinant plasmids (i.e. only the vector) grow into blue colonies.

plural of platform screen door

plural of blue-white screen

plural of clear view screen

A performer's first role on a television show.

(film) A scene in which the frame is split into two or more frames each with their own subject, often taking place simultaneously.

(computing, informal) An error or issue occuring in Apple operating systems and other technologies that causes the computer or device to cease working and display only a white screen.

plural of white screen of death