Definition of Segmental
Seg`men´tal
a.
1.
Relating
to
,
or
being
,
a
segment
.
2.
(Anat. & Zool.)
Of
or
pertaining
to
the
segments
of
animals
;
as
,
a
segmental
duct
;
segmental
papillæ.
Segmental duct
(Anat.)
the
primitive
duct
of
the
embryonic
excretory
organs
which
gives
rise
to
the
Wolffian
duct
and
ureter
;
the
pronephric
duct
.
Segmental organs
a
-
(Anat.)
The
embryonic
excretory
organs
of
vertebrates
,
consisting
primarily
of
the
segmental
tubes
and
segmental
ducts
b
-
(Zool.)
The
tubular
excretory
organs
,
a
pair
of
which
often
occur
in
each
of
several
segments
in
annelids
.
They
serve
as
renal
organs
,
and
often
,
also
,
as
oviducts
and
sperm
ducts
.
See
Illust.
under
Sipunculacea
.
Segmental tubes
(Anat.)
the
tubes
which
primarily
open
into
the
segmental
duct
,
some
of
which
become
the
urinary
tubules
of
the
adult
.
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