spiral

spiral
adjective

winding in a continuous and gradually widening (or tightening) curve, either around a central point on a flat plane or about an axis so as to form a cone
由里及外（或由外及里的）平面螺旋形的；（围绕轴线的）圆锥螺旋形的
a spiral pattern.
螺旋形图案。
■winding in a continuous curve of constant diameter about a central axis, as though along a cylinder; helical
圆柱螺旋形的
■(of a stairway) constantly turning in one direction as it rises, around a solid or open center
（楼梯）螺旋上升的
■(Medicine)(of a fracture) curving round a long bone lengthwise
(医)扭折（骨折的一种）
■short for spiral-bound:
spiral-bound 的简称:
a spiral notebook.
一个螺旋装订的笔记本。

noun

a spiral curve, shape, or pattern
螺旋形
he spotted a spiral of smoke.
他看见了一道缭绕上升的烟雾。
■a spiral spring
螺旋形弹簧
■(Astronomy). short for spiral galaxy
(天文)。 spiral galaxy 的简称
(亦作 vicious spiral)a progressive rise or fall of prices, wages, etc., each responding to an upward or downward stimulus provided by a previous one
（物价、工资等后浪推前浪式的）恶性螺旋形上升（或下跌）
an inflationary spiral.
螺旋形恶性通货膨胀。
■a process of deterioration through the continuous increase or decrease of a specified feature
（因特定情况的持续加剧或减弱所引起的）恶化过程，恶变
this spiral of deprivation and environmental degradation.
贫困和环境退化所造成的处境恶化。

(spiralled, spiralling; 美 spiraled, spiraling)

[no obj., with adverbial of direction]move in a spiral course
螺旋形运动
a wisp of smoke spiralled up from the trees.
一缕轻烟从林中袅袅升起。
■[with obj. and adverbial]cause to have a spiral shape or follow a spiral course
使成螺旋形，使螺旋形运动
spiral the bandage round the injured limb.
在受伤的肢体上一圈圈缠上绷带。
[no obj.]show a continuous and dramatic increase
持续急剧上升
inflation continued to spiral.
通货膨胀持续飙升。
[as adj. spiralling]he needed to relax after the spiralling tensions of the day.
在步步紧逼的压力之下工作了一天之后他需要休息。
■(spiral down/downward)decrease or deteriorate continuously
持续下降；持续恶化
he expects the figures to spiral down further.
他希望数字能进一步下降。

派生
spirally
adverb
语源

mid 16th cent. (as an adjective): from medieval Latin spiralis, from Latin spira 'coil' (see spire)

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