a combining form meaning “spiral”; used with this meaning and as a combining form of helix in the formation of compound words: helicograph.
Also, especially before a vowel, helic-.

< Greek heliko-, combining form of hélix

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World English Dictionary
helico- or (before a vowel) helic-
combining form
spiral or helical: helicograph
[from Latin, from Greek helix spiral]
helic- or (before a vowel) helic-
combining form
[from Latin, from Greek helix spiral]

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