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[hel-i-keys, hee-li‐]
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noun Biochemistry.
  1. any of the enzymes that use the energy derived from the hydrolysis of nucleoside triphosphates to unwind the double-stranded helical structure of nucleic acids: RNA and DNA helicases.
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Origin of helicase

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018