adj.
winding in a continuous and gradually widening (or tightening) curve around a central point or axis.
▸winding in a continuous curve of constant diameter about a central axis, as though along a cylinder; helical.
▸Astronomy denoting galaxies in which the stars and gas clouds are concentrated mainly in spiral arms.
n.
- a spiral curve, shape, or pattern.
- a progressive rise or fall of prices, wages, etc., each responding to an upward or downward stimulus provided by a previous one.
▸a process of progressive deterioration.
v.
(spirals, spiralling, spiralled; US spirals, spiraling, spiraled)
- take or cause to follow a spiral course.
- show a continuous and dramatic increase.
▸
(spiral down/downward)
decrease continuously.
Derivative
Etymology
C16: from med. L. spiralis, from L. spira (see spire2).
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