noun, noun which may take the genitive case particle 'no'
helical; spiral-shaped
Describes something having the shape of a helix or spiral. Used as a noun or with の to modify another noun.
DNAは螺旋状の構造をしている。
DNA has a helical structure.
螺旋状の階段を上った。
I climbed the spiral staircase.
螺旋 is the noun 'spiral' or 'helix' itself; 螺旋状 adds 状 ('-shaped') to describe the shape of something else.
Compound of 螺旋 (rasen, 'spiral') + 状 (jō, '-shaped').