noun

speedometer

speedometer

The speedometer showed we were doing 70 mph.

The speedometer showed we were doing 70 mph.

a speedometer a device that measures speed The speedometer showed we were doing 70 mph.

Synonyms: tachometer (measures rotational speed, but often used for car speed)

From 'speed' + Greek 'metron' (measure). Literally 'speed-measurer'.

Break it down: 'speed-o-meter'. It's a 'meter' for 'speed'.

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