spiral

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spiral

 [spi´ral]
1. winding like the thread of a screw; called also helical.
2. a winding structure; see also coil and helix.
Curschmann's s's coiled fibrils of mucin sometimes found in the sputum of patients with asthma. See also Laënnec's pearls.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

spi·ral

(spī'răl),
1. Coiled; winding around a center like a watch spring; winding and ascending like a wire spring.
2. A structure in the shape of a coil.
[Mediev. L. spiralis, fr. G. speira, a coil]
Farlex Partner Medical Dictionary © Farlex 2012

spi·ral

(spī'răl)
1. Coiled; winding around a center like a watch spring; winding and ascending like a wire spring.
2. A structure in the shape of a coil.
[Mediev. L. spiralis, fr. G. speira, a coil]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

spi·ral

(spī'răl)
1. Coiled; winding around a center like a watch spring; winding and ascending like a wire spring.
2. Structure in shape of a coil.
[Mediev. L. spiralis, fr. G. speira, a coil]
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
Then comes the scramble for tools and our confidence spirals downward.
Yan'ni gets pregnant and Muyu guilt-trips her into having the baby instead of "selfishly" continuing her precious education; the couple spirals downward exponentially until Yan'ni is forced to give up her baby, repeating her mother's past mistakes and taking her place in the long line of Muyu's female victims.
There, in near darkness, we celebrate the wild whistling of an American woodcock as he spirals downward in the death-defying free-fall of his courtship routine.