seashell /ˈsi:ˌʃel/ n. [c] 海中软体动物的壳，贝壳：My children love collecting seashells.我的孩子们喜欢收集贝壳。

 seaside /ˈsi:said/ n.（带定冠词）海滨，海边：at the seaside 在海边；a summer cottage by the seaside 海滨避暑别墅；go to the seaside for our holidays去海滨度假