[from its protective function] n. the operculum, the horny lid of the conch or other gastropods which closes the shell when the foot is retracted. = CAP, HORN, SPUR (Black)
[from its protective function] n. the operculum, the horny lid of the conch or other gastropods which closes the shell when the foot is retracted. = CAP, HORN, SPUR (Black)
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