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oper·cu·lum | \ ō-ˈpər-kyə-ləm 
\
\ plural opercula\ ō-ˈpər-kyə-lə \ also operculums
\ also operculumsDefinition of operculum
1 : a body process or part that suggests a lid: such as
a : a horny or shelly plate on the posterior dorsal surface of the foot in many gastropod mollusks that closes the shell when the animal is retracted
b : the covering of the gills of a fish — see fish illustration
2 : a lid or covering flap (as of a moss capsule)
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More Definitions for operculum
operculum
nounoper·cu·lum | \ ō-ˈpər-kyə-ləm \
\ plural opercula\ -lə \ also operculums
\ also operculumsMedical Definition of operculum
: any of several parts of the cerebrum bordering the sylvian fissure and concealing the insula
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Time Traveler for operculum
The first known use of operculum was in 1681
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