helix
/ˈhiːlɪks/ noun, verb
Forms helixes helices helixing helixed
- noun (mathematics) A curve on the surface of a cylinder or cone such that its angle to a plane perpendicular to the axis is constant; the three-dimensional curve seen in a screw or a spiral staircase.
- noun (architecture) A small volute under the abacus of a Corinthian capital.
- noun (anatomy) The incurved rim of the external ear. “helix piercing”
- noun An upside down midair 360° spin in playboating.
- verb To form or cause to form a helix.
Synonyms
Etymology
From Latin helix, from Ancient Greek ἕλιξ (hélix, “something twisted or spiral”).
Webster’s 1913
- noun 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 spiral, all the convolutions of which are in the plane.
- noun A caulicule or little volute under the abacus of the Corinthian capital.
Etymology [L. helix, Gr. volvere, and E. volute, voluble.]
Sources: Wiktionary · WordNet 3.0 · Webster’s 1913 — from the Wiktionary entry “helix”, CC BY-SA 4.0. Details