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词汇 phototimer
释义

Definition of phototimer in English:

phototimer

noun

  • 1A photoelectric timer for regulating exposure time in radiography.

  • 2A timer for races incorporating a camera which photographs the finish.

Origin

1940s; earliest use found in American Journal of Roentgenology.

Definition of phototimer in US English:

phototimer

noun

  • 1A photoelectric timer for regulating exposure time in radiography.

  • 2A timer for races incorporating a camera which photographs the finish.

Origin

1940s; earliest use found in American Journal of Roentgenology.
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