[f. SPEED sb. + -ometer -METER.] A speed-indicator, esp. one affixed to an automobile.
1866. Daily Times, 29 Jan., 3/1. A Speedometer is badly wanted at the Police Office…. Sleigh riding at four miles the hour is the rule in Reading.
1904. Times, 4 Aug., 13/1. His ‘speedometer’ … showed he was going at only ten miles an hour.
