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Pronunciation: me'ter


  1. The fundamental unit of length in the SI and metric system, equivalent to 39.37007874 inches. Defined as the length of the path traveled by light in a vacuum in 1299792458 seconds.
  2. A device for measuring the quantity of that which passes through it.

[Fr. metre; G. metron, measure]

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.