| Answer | Crossword Clue |
|---|---|
| SEDER | Meal at which parsley is dipped in salt water |
| thermoclines | A steep temperature gradient in a body of water such as a lake, marked by a layer above and below which the water is at different temperatures |
| thermocline | A steep temperature gradient in a body of water such as a lake, marked by a layer above and below which the water is at different temperatures |
| caissons | A large watertight chamber, open at the bottom from which the water is kept out by air pressure and in which construction work may be carried out under water |
