ronnagram

R1O1N1N1A1G2R1A1M3

noun

An SI unit of mass equal to 10²⁷ grams. Symbol: Rg

“The Earth weighs about six ronnagrams.”

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Meanings

nounronnagram (plural ronnagrams)

plural ronnagrams · alternative UK ronnagramme

  1. metrologyAn SI unit of mass equal to 10²⁷ grams. Symbol: Rg

    The Earth weighs about six ronnagrams.

    1 more example

    The arrival of the new prefixes means the Earth can now be said to weigh six ronnagrams, and Jupiter about two quettagrams.

    2022 November 18, Ian Sample, “Earth weighs in at six ronnagrams as new prefixes picked for big and small”, in The Guardian

Origin

From ronna- + gram.

Full word history & related roots →
Cite this entry
APA

ronnagram. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/ronnagram

MLA

“ronnagram.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/ronnagram. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “ronnagram,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/ronnagram.

Source: ronnagram on Wiktionary, CC BY-SA 4.0.