The term SEA SECTION can be broken down into two parts: SEA and SECTION. The first part, SEA, can be defined as the large body of salt water that covers most of the Earth's surface. The second part, SECTION, can be defined as a distinct part or portion of something larger. Therefore, when combined, SEA SECTION can be defined as a distinct part of the SEA. The crossword solution for this term is ARM, which stands for an area of the SEA that is partially enclosed by land.