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n. pl. su·per·he·lix·es or su·per·hel·i·ces (hĕl′ĭ-sēz′, hē′lĭ-)
A structure in which a helix is itself coiled into a helix, as in a DNA supercoil.

su′per·hel′i·cal (-hĕl′ĭ-kəl, -hē′lĭ-) adj.
su′per·hel′i·cal·ly adv.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


n, pl -helices (-ˈhɛlɪˌsiːz) or -helixes
(Biochemistry) biochem a molecular structure in which a helix is coiled into a higher-order helix
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈsu pərˌkɔɪl)

a twist formed by intertwining strands of DNA or by protein chains.
su′per•coiled`, adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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References in periodicals archive ?
Through several rounds of such repeated twisting, DNA and protein are finally packaged into the superhelix structure, chromatin.
Besides, ARM-repeat units tandem fold together forming a superhelix that provides a versatile platform for interacting with other protein partners (Coates, 2003; Liu et al., 2008; Zhao et al., 2009; Striegl et al., 2010).
The damage of DNA appeared as the break of single-stranded DNA and double-stranded DNA and the disappearance of plasmid superhelix fragment [25-27].