noun, plural hel·i·ces , [ hel- uh-seez] /ˈhɛl əˌsiz/ he·lix·es. a spiral. . Geometry the curve formed by a straight line drawn on a plane when that plane is wrapped around a cylindrical surface of any kind, especially a right circular cylinder, as the curve of a screw. Equation: x = a sinθ, y = a cosθ, z = b θ. . Architecture a spiral ornament. (in a Corinthian capital) either of two scrolls issuing from a cauliculus. Compare Corinthian. (def 2) . Anatomy the curved fold forming most of the rim of the external ear. Origin of helix 1555–65; < Latin: a spiral, a kind of ivy < Greek hélix anything twisted; compare helíssein to turn, twist, roll
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Related Words for helix screw
spiral Examples from the Web for helix Contemporary Examples of helix Historical Examples of helix
helix is prolonged so as to divide the concha in two.
The expanded metal covering was also wire tied to the
For ornaments they have a stick in the
helix, or simple ornament in the ear-lobe.
Does the current in the wire at the top of the
helix move east or west? Helix (Theba) cartusiana (first noticed near a Carthusian monastery). British Dictionary definitions for helix noun plural helices ( ˈhɛlɪˌsiːz) or helixes a curve that lies on a cylinder or cone, at a constant angle to the line segments making up the surface; spiral a spiral shape or form the incurving fold that forms the margin of the external ear any terrestrial gastropod mollusc of the genus Helix, which includes the garden snail ( H. aspersa) Word Origin for helix
C16: from Latin, from Greek: spiral; probably related to Greek
helissein to twist
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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Word Origin and History for helix n.
"a spiral thing," 1560s, from Latin
helix "spiral," from Greek helix (genitive helikos), related to eilein "to turn, twist, roll," from PIE *wel-ik-, from root *wel- "to turn, revolve" (see volvox).
Online Etymology Dictionary, © 2010 Douglas Harper
n. pl. he•lix•es A spiral form or structure. The folded rim of skin and cartilage around most of the outer ear. A three-dimensional curve that lies on a cylinder or cone, so that its angle to a plane perpendicular to the axis is constant.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
A three-dimensional spiral curve. In mathematical terms, a helix can be described as a curve turning about an axis on the surface of a cylinder or cone while rising at a constant upward angle from a base. Something, such as a strand of DNA, having a spiral shape.
The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
geometry, a three-dimensional spiral shape, resembling a spring.
The New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.