Definition of Operculum
O`per´cu`lum
n.
1.
(Bot.)
The
lid
of
a
pitcherform
leaf
.
2.
(Anat.)
Any
lidlike
or
operculiform
process
or
part
;
as
,
the
opercula
of
a
dental
follicle
.
3.
(Zool.)
The
lid
closing
the
aperture
of
various
species
of
shells
,
as
the
common
whelk
.
See
Illust.
of
Gastropoda
.
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