Arenaceous is an adjective used to describe something that is composed of or resembles sand. The term can be broken down into three crossword solutions: POWDERY (7 letters), SANDY (5 letters), and GRANULAR (8 letters). POWDERY describes something that is made up of very fine particles, while SANDY refers to something that is covered in or composed of sand. GRANULAR describes something that is composed of small grains or particles. Together, these three words provide a comprehensive description of the term arenaceous.