Circinate shapes are curved shapes that resemble a coil or spiral. They are often found in nature, such as the shape of a fern frond or a nautilus shell. The term 'circinate' comes from the Latin word for 'RING'. The crossword solution for the term 'circinate shapes' is TORI, which is a type of circinate shape. Tori are three-dimensional shapes that are formed by revolving a circle around an axis.