Spiral (7)
'spiral' is the definition.
(I know that spiral can be written as helix)
This is all the clue.
(Other definitions for helix that I've seen before include "Structure made up of a continuous series of loops" , "that goes round and round and up and down" , "Structure consisting of something wound in a continuous series of loops" , "Screwed coil" , "Object with a three-dimensional shape, like a corkscrew" .)
'spiral' is the definition.
(I know that spiral can be written as coil)
This is all the clue.
(Other definitions for coil that I've seen before include "Wind (ropes) - gather (hair)" , "Wind (wire, rope, etc)" , "Wound length (of rope)" , "Curl, loop" , "Eg, wire wound round and round" .)
'spiral' is the definition.
(I know that spiral can be written as helical)
This is all the clue.
(Other definitions for helical that I've seen before include "Like a spiral or spring" , "Like the pattern on a snail's shell" , "Curled like corkscrew" , "In the form of a spiral" , "Spiral-shaped" .)