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Adjective: nocturnal  nók'turn(u)l
  1. Belonging to or active during the night
    "nocturnal animals are active at night"; "nocturnal plants have flowers that open at night and close by day"
     
  2. Of or relating to or occurring in the night
    "nocturnal darkness"

See also: night, nocturnally

Antonym: diurnal

Encyclopedia: Nocturnal

Nearest

noctiluca
Noctiluca miliaris
noctilucent
Noctua
noctuid
noctuid moth
Noctuidae
noctule
nocturia
nocturn
nocturnal
nocturnal emission
nocturnally
nocturne
nocuous
nod
nod off
nodal
nodal rhythm
nodder
nodding