Word.ws English Dictionary

nycthemeron

nycthemeron is the alternative spelling of nychthemeron.

Meaning of nychthemeron

Noun

nychthemeron (plural nychthemera or nychthemerons)

  1. (uncommon) A period of one day and one night, a date: in the West, a period of 24 consecutive hours.
    • It has not yet been found by Observation, whether Mercury turns upon its own Axis, ... that is, whether it has the vicissitude of Day and Night, much less what is the space of its Nychthemeron or Natural Day; but one may safely enough conjecture that it does revolve about its Axis, since the other...1715, David Gregory, The Elements of Astronomy, Physical and Geometrical, volume 2

Forms of nycthemeron

pluralnycthemera
pluralnycthemerons

Questions about nycthemeron

What is nycthemeron the alternative spelling of?
Nycthemeron is the alternative spelling of nychthemeron.

Words near nycthemeron in the dictionary

  1. nycteroleterids
  2. nycthemera
  3. nycthemeral
  4. nycthemere
  5. nycthemeres
  6. nycthemeron
  7. nycthemerons
  8. nycti-
  9. nyctibatrachid
  10. nyctibatrachids
  11. nyctibiid

Source and license

Adapted from Wiktionary: nycthemeron (page history and authors); nychthemeron (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

Last updated:

Cite this entry: “nycthemeron.” Word.ws, https://word.ws/nycthemeron. Based on Wiktionary, CC BY-SA 4.0.