cometarium

English

Etymology

Noun

cometarium (plural cometaria)

(astronomy) An instrument intended to represent the revolution of a comet around the Sun.
- 1791, Thomas Vivian, Cosmology. An Enquiry Into the Cause of what is Called Gravitation, Etc.:
  we have their [comets'] path marked in cometariums formed on the imaginary law of attraction

References

“cometarium”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.

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