へたへたMeanings1nounoperculum (of a shellfish)usually written using kana alonezoologyZoological term for the hard, protective plate that covers the opening of a gastropod shell when the animal retracts.サザエのへたは固かたくて、身みを守まもる役やく割わりがある。The operculum of a turban shell is hard and serves to protect the body.
