An abbreviation for dekameter, a metric unit of length equal to 10 meters, used in scientific and surveying contexts.
Abbreviated from 'dekameter,' combining the Greek prefix 'deka-' (ten) with 'meter' (from Greek 'metron' meaning measure). It's part of the standardized metric system established in the late 1700s.
A dekameter is the perfect distance for a short city block or the length of a small house—and yet we almost never use the word, preferring to just say '100 feet' or '10 meters.' It's one of those metric units that's theoretically perfect but practically ignored.
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