the.com/moving pictures

means An old-fashioned name for movies — film projected fast enough that still images blur into motion.

from A literal, descriptive coinage from the late 1800s, when film was genuinely novel: audiences needed a name for the astonishing fact that photographs could move. 'Moving pictures' (later clipped to 'movies') simply said what was happening on the screen, because no existing word did. The phrase survived longest in 'motion picture,' its more formal sibling, while everyday speech wore it down to something shorter.