A long piece of film with successive frames of still images (each usually 18 mm x 24 mm), used in educational environments. When prohjected through a film strip projector, each frame is displayed one after the other, usually turned by hand according to cues on an accompanying audio presentation.
In phototypesetting, a film strip is a chemically-treated photosensitive strip of film or paper on which character images are exposed. Also spelled as one word, filmstrip.