Definition of nyctohemeral in English:

nyctohemeral

adjective

Physiology Biology
  • = nycthemeral.

Origin

1940s; earliest use found in William Dorland (1864–1956), obstetrician. Variant of nycthemeral, probably after nycto-.

Pronunciation

nyctohemeral

/ˌnɪktəʊˈhɛm(ə)r(ə)l//ˌnɪktəʊˈhɛm(ə)rəl/