The term CHINE refers to a sharp RIDGE or CREST formed by the intersection of two sloping surfaces, such as the back of a boat. The crossword solutions for this term are CREST (5 letters), RIDGE (5 letters), BACKBONE (8 letters), and SILK (4 letters). CREST is a term used to describe the highest point of a hill or mountain, while RIDGE is a long, narrow elevation of land that runs between two valleys. BACKBONE is a term used to describe the spine, which is the central structure of the body that supports the head and limbs. Finally, SILK is a type of fabric made from the fibers of certain insects, which is often used to make clothing.