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OPN
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opn
English
edit
Noun
edit
OPN
(
plural
OPNs
)
Initialism of
omnipause
neuron
.
Anagrams
edit
'pon
,
NOP
,
NPO
,
Nop
,
ONP
,
Pon
,
nop
,
pon
Categories
:
English lemmas
English nouns
English countable nouns
English initialisms