WordReference Random House Unabridged Dictionary of American English © 2026
helico-, 
  1. a combining form meaning "spiral'';
    used with this meaning and as a combining form of helix in the formation of compound words:helicograph.
Also,[esp. before a vowel,] helic-. 
  • Greek heliko-, combining form of hélix

Collins Concise English Dictionary © HarperCollins Publishers::
helico-, (before a vowel) helic- combining form
  1. spiral or helical
Etymology: from Latin, from Greek helix spiral
'helico-' also found in these entries (note: many are not synonyms or translations):
helicopter - helic- - helichrysum - helicograph - helicon - helicospore

Forum discussions with the word(s) "helico-" in the title:


Look up "helico-" at Merriam-Webster
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