спирален означава в английски

helical▼(in the shape of a helix)
adjective
[UK: ˈhe.lɪk.l̩] [US: ˈhe.lɪk.l̩]

helicoid▼(having the form of a flattened helix)
adjective
[UK: hˈelɪkˌɔɪd] [US: hˈelɪkˌɔɪd]

spiral▼(helical)
adjective
[UK: ˈspaɪə.rəl] [US: ˈspaɪ.rəl]