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ronnametre

From Wiktionary, the free dictionary

English

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Alternative forms

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Etymology

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From ronna- +‎ metre.

Noun

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ronnametre (plural ronnametres) (British spelling)

  1. (metrology) An SI unit of length equal to 1027 metres. Symbol: Rm
    The observable universe is about one ronnametre in diameter.

Anagrams

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