Whorl is a type of spiral pattern. Other meanings of whorl include: Whorl (mollusc), a single, complete 360° turn in the spiral growth of a mollusc shell Body whorl, in a mollusc shell the most recently formed whorl of a spiral shell, terminating in the aperture A whorl of sepals or petals or leaves on plants, in which all the parts are attached at the same point and surround or wrap around the stem. In biology a whorl might occur at the ends of different structures or occur in the m… (More on Whorl)