Tendrils are thin, curling or coiling structures that are found in plants and some animals. They are used for support, climbing, and anchoring. In plants, tendrils are typically thin, flexible stems that curl around objects for support. The two crossword solutions for the term 'tendrils' are 'curls' and 'CIRRI'. Curls are a type of tendril that is characterized by its spiral shape, while CIRRI are thin, thread-like tendrils that are usually found in aquatic plants.