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.

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]

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]

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]
References in periodicals archive ?
Thin conical shell, number of whorls 4, umbilicus imperforate, shell light brownish in colour, dextral, thin and somewhat squarely ovate, body whorl abruptly enlarged, spire cone shaped, aperture large, very broad and ear shaped, shell sculpture spirally striated, apex sharp and pointed.
Calvo: Hannibal Pipes SA was established in 2009 with the target of becoming the first state-of-the-art spirally welded steel pipe mill in the South of Spain serving the local market as well as the international one with particular respect to Mediterranean countries, North Africa and Latin America.
Ascospores brownish, ellipsoidal, 8-12 x 4-5 pm, with spirally arranged ridges and some cracks which distort the ridges in mature ascospores.
The Vertigo label, with its spirally graphics, gave us some big names such as Black Sabbath and Status Quo.
MITRID--of the Mitridae family of spirally sculptured seashells.
The Zimmer PowerStop has a spirally grooved piston for the passage of the damping oil from the lower reservoir to an exhaust channel.
Heli-Tube Spirally Cut Polyethylene Cable Wrap and abrasion Protector can be easily installed by hand over any section of hose that may be subject to chafing.
The effect is created by spirally curved, inward-pointing needles that twist covetously around the plant's flexible stems--cascading locks on a seemingly restless tree.
The building, it should be noted, is built of steel rein forced concrete and masonry throughout, supported by narrowly spaced, spirally reinforced concrete columns varying in thickness from 14 to 21 inches, with the larger columns, naturally, to be found in the first story.
Based on this, the PM would select a developer who had a demonstrated track record of working with laboratories to spirally develop a system along such potential technology paths.