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diameter
noun
the
straight
line
passing
through
the
center
of
a
circle
or
sphere
,
connecting
two
points
on
the
edge
;
or
the
length
of
this
line
.
•
The
diameter
of
this
pizza
is
12
inches
.
The
diameter
of
this
pizza
is
12
inches
.
•
What
is
the
diameter
of
the
Earth
?
What
is
the
diameter
of
the
Earth
?
From
Middle
English
diameter
,
from
Old
French
diametre
,
from
Latin
diametrus
,
from
Ancient
Greek
διαμέτρος
(
diametros
),
equivalent
to
dia-
+
meter
.
