01 n. The lid of a pitcherform leaf.
pl.
Opercula, Operculums ((#))
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1.
The lid of a pitcherform leaf.(Bot.)
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2.
Any lidlike or operculiform process or part; as, the opercula of a dental follicle.(Anat.)
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3.
The lid closing the aperture of various species of shells, as the common whelk. See Illust. of Gastropoda.(Zool.) See: Gastropoda