Nychthemeral
//nɪkˈθɛm.(ə.)ɹəl// adj
adj ·Rare ·Advanced level
Definitions
Adjective
- 1 Relating to or lasting a nychthemeron (a period of 24 hours). not-comparable
"Observations on sea-anemones in dimly lighted situations, such as under bridges and so forth, showed that these animals were more or less continuously expanded, but aside from such exceptions it was clear that Metridium in its natural surroundings exhibited a well-marked nychthemeral rhythm."
Example
More examples"Observations on sea-anemones in dimly lighted situations, such as under bridges and so forth, showed that these animals were more or less continuously expanded, but aside from such exceptions it was clear that Metridium in its natural surroundings exhibited a well-marked nychthemeral rhythm."
Etymology
From nychthemeron + -al.
More for "nychthemeral"
Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.