- Archaic. an astrolabe for telling time at night or for determining latitude by the position of certain stars in reference to Polaris.
Origin of nocturnal
SynonymsSee more synonyms for nocturnal on Thesaurus.com
Examples from the Web for nocturnally
And as Snap's master went down the meadow, the parts likely to be nocturnally affected began to burn and tingle.Cleg Kelly, Arab of the City
S. R. (Samuel Rutherford) Crockett
- of, used during, occurring in, or relating to the night
- (of animals) active at night
- (of plants) having flowers that open at night and close by day
Word Origin and History for nocturnally
late 15c., from Old French nocturnal "nightly, nocturnal," or directly from Late Latin nocturnalis, from Latin nocturnus "belonging to the night," from nox (genitive noctis) "night," cognate with Old English neaht (see night) + -urnus, suffix forming adjectives of time. Nocturnal emission "involuntary ejaculation during sleep" first recorded 1813.
- Of, relating to, or occurring in the night.
- Most active at night.
- Occurring at night.
- Most active at night. Many animals, such as owls and bats, are nocturnal.
- Having flowers that open during the night and close at daylight. Nocturnal plants are often pollinated by moths. Compare diurnal.