a device formerly used for taking a series of instantaneous photographs of a rapidly moving object
a picture taken by such a device.
the tracing or record is made by a pencil of light on a sensitized surface.
an instrument for measuring small intervals of time by the photographic trace of a pencil of light.
pho·to·chro·nog·ra·phy /ˌfoʊtoʊkrəˈnɒgrəfi/ [foh-toh-kruh-nog-ruh-fee] Show IPA , noun
is always a great word to know.
So is doohickey. Does it mean: