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helio-(hē'lē-ō), Do not confuse this combining form, which is pronounced with long e, and helico- (from helix, which is pronounced with short e.
Farlex Partner Medical Dictionary © Farlex 2012
helio-prefix denoting the sun.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005