| undertow | (n) the seaward undercurrent created after waves have broken on the shore, Syn. sea-puss, sea purse, sea-purse, sea puss, sea-poose |
| Sea pudding | (Zool.) Any large holothurian. [ Prov. Eng. ] [ 1913 Webster ] |
| Sea purse | (Zool.) The horny egg case of a skate, and of certain sharks. [ 1913 Webster ] |
| Sea purslane | (Bot.) See under Purslane. [ 1913 Webster ] |