helix /ˈhiːlɪks/noun 4verb 1forms 4 noun4 •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. •A small volute under the abacus of a Corinthian capital. •The incurved rim of the external ear. •An upside down midair 360° spin in playboating. verb1 •To form or cause to form a helix.A large positive inclination gives a chip which will helix out of the space between the face mill and the workpiece. — 1953 formshelixed · helixing · helixes · helices