spiral
adjective/ˈspaɪrəl/
/ˈspaɪrəl/
- moving in a continuous curve that winds around a central point
- A snail's shell is spiral in form.
Word Originmid 16th cent. (as an adjective): from medieval Latin spiralis, from Latin spira ‘coil’, from Greek speira ‘a coil’.
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spiral