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siderograph

noun
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sid·​er·​o·​graph | \ ˈsidərəˌgraf, -rȧf \

Definition of siderograph

: a combination clock and navigation device that keeps the sidereal time of the Greenwich meridian of longitude

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History and Etymology for siderograph

sidero- entry 2 + -graph

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Cite this Entry

“Siderograph.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/siderograph. Accessed 25 January 2020.

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