螺旋状的
Helical \Hel"i*cal\, a. [From {Helix}.] Of or pertaining to, or in the form of, a helix; spiral; as, a helical staircase; a helical spring. -- {Hel"i*cal*ly}, adv.
helical adj : in the shape of a coil [syn: {coiling}, {spiral}, {spiraling}, {volute}, {voluted}, {whorled}, {turbinate}]