• A three-dimensional curve that lies on a cylinder or cone, so that its angle to a plane perpendicular to the axis is constant.
  • A spiral form or structure.
  • The folded rim of skin and cartilage around most of the outer ear.
  • A volute on a Corinthian or Ionic capital.
  • To move or position (something) into the shape of a helix.
  • To have the shape of a helix.
  • To move along a helical course; spiral.
  • A spiral line, as of wire in a coil; a winding, or something that is spiral; a circumvolution; specifically, in <em>geometry</em>, the curve assumed by a right line drawn on a plane when that plane is wrapped round a cylindrical surface of any kind, especially a right cylinder, as the curve of a screw-thread; also, a curve on any developable surface which becomes a right “line when the surface is developed into a plane, as a conical helix.
  • In <em>architecture</em>, any spiral, particularly a small volute or twist under the abacus of the Corinthian capital; also, a volute of the Ionic capital.
  • In <em>electricity</em>, a coil of wire, as that surrounding the core of an electromagnet.
  • In <em>anatomy</em>: The prominent curved fold which forms most of the rim or margin of the outer ear. See second cut under <internalXref urlencoded="ear">ear</internalXref>.
  • The cochlea of the inner ear.
  • [<em>capitalized</em>] [NL.] In <em>conchology</em>, the representative genus of <em>Helicidæ</em> and <em>Helicinæ.</em>
  • A nonplane curve whose tangents are all equally inclined to a given plane. The common helix is the curve formed by the thread of the ordinary screw. It is distinguished from the <ex>spiral</ex>, all the convolutions of which are in the plane.
  • A caulicule or little volute under the abacus of the Corinthian capital.
  • The incurved margin or rim of the external ear. See <ex>Illust.</ex> of <er>Ear</er>.
  • A genus of land snails, including a large number of species.
  • A curve on the surface of a <xref>cylinder</xref> or <xref>cone</xref> such that its <xref>angle</xref> to a <xref>plane</xref> <xref>perpendicular</xref> to the <xref>axis</xref> is <xref>constant</xref>; the <xref>three-dimensional</xref> curve seen in a <xref>screw</xref> or a <xref>spiral staircase</xref>.
  • A small <xref>volute</xref> under the <xref>abacus</xref> of a <xref>Corinthian</xref> <xref>capital</xref>.
  • The incurved <xref>rim</xref> of the <xref>external</xref> <xref>ear</xref>.
  • a curve that lies on the surface of a cylinder or cone and cuts the element at a constant angle
  • a structure consisting of something wound in a continuous series of loops
  • type genus of the family Helicidae
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