convoluted
1. [ adjective ] rolled or coiled together
Examples:

"a convoluted shell"

Related terms: coiled
2. [ adjective ] highly involved or intricate
Synonyms: intricate tangled tortuous labyrinthine knotty involved Byzantine
Examples:

"the Byzantine tax structure" "convoluted reasoning" "intricate needlework" "the plot was too involved" "a knotty problem" "labyrinthine maneuvering" "Oh, what a tangled web we weave"- Sir Walter Scott

Related terms: complex
Similar spelling:   convolute
  convolve
  convolution
  convolvulus
  convulse