Definition of Equinoctial
E`qui`noc´tial
a.
1.
Pertaining
to
an
equinox
,
or
the
equinoxes
,
or
to
the
time
of
equal
day
and
night
;
as
,
the
equinoctial
line
.
2.
Pertaining
to
the
regions
or
climate
of
the
equinoctial
line
or
equator
;
in
or
near
that
line
;
as
,
equinoctial
heat
;
an
equinoctial
sun
.
3.
Pertaining
to
the
time
when
the
sun
enters
the
equinoctial
points
;
as
,
an
equinoctial
gale
or
storm
,
that
is
,
one
happening
at
or
near
the
time
of
the
equinox
,
in
any
part
of
the
world
.
Equinoctial colure
(Astron.)
the
meridian
passing
through
the
equinoctial
points
.
Equinoctial line
(Astron.)
the
celestial
equator
; -
so
called
because
when
the
sun
is
on
it
,
the
nights
and
days
are
of
equal
length
in
all
parts
of
the
world
.
See
Equator
.
Thrice
the
equinoctial line
He
circled
.
- Milton.
n.
1.
The
equinoctial
line
.
Related Words
equator
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