Home
Random
Log in
Settings
Donations
About Wiktionary
Disclaimers
Search
black aurora
Language
Watch
Edit
English
edit
Noun
edit
black
aurora
(
plural
black auroras
or
black aurorae
)
A
structure
that is
embedded
in a
uniformly
bright
aurora
, where its
optical
emission
is
significantly
reduced
, presenting as either
patches
or
arcs
that mainly
drift
eastwards
.
Categories
:
English lemmas
English nouns
English countable nouns
English multiword terms
Hidden category:
Pages with 1 entry