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Meaning of ASTRONOMICAL UNIT
WordNet Dictionary
Definition:
[n]
a
unit
of
length
used
for
distances
within
the
solar
system
;
equal
to
the
mean
distance
between
the
Earth
and
the
Sun
(
approximately
93
million
miles
or
150
million
kilometers
)
Websites:
Synonyms:
AU
See Also:
astronomy unit
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