Definition of Uropygial gland
a
peculiar
sebaceous
gland
at
the
base
of
the
tail
feathers
in
most
birds
.
It
secretes
an
oily
fluid
which
is
spread
over
the
feathers
by
preening
.
See also:
Uropygial
Related Words
bird
,
oil
gland
,
preen
gland
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Urochrome
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Uroerythrin
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