The term 'arranged in spirals' can be described as something that is COILED, which has 6 letters. This term is often used to describe a pattern or shape that is formed by winding a line around a central point in a circular motion. This type of pattern is often seen in nature, such as in the shells of snails and the horns of certain animals. It is also used in art and architecture, where it is used to create decorative patterns.