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spiny-headed worm
spiny lobster
spiny mouse
spiracle
spiraea
spiral
spiral binding
spiral galaxy
spiral of Archimedes
spiral staircase
spiran
spirant
spire (1)
spire (2)
spirea
spirelet
spirillum
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spiral of Archimedes
spi·ral of Ar·chi·me·des


noun 
Definition:
 
spiral formed by moving point: a spiral curve formed by a point moving at constant speed to or from a fixed point and along a line rotating, also at a constant speed, about the point
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