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A structure of a helix, especially a DNA molecule, in which the axis of the helix itself is coiled, causing the helix to loop over itself.
intr.v. su·per·coiled, su·per·coil·ing, su·per·coils
To form a supercoil.
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.
a coil consisting of coils, a complex coil; particularly, a superhelical structure of DNA
to make into or become a complex coil
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
a twist formed by intertwining strands of DNA or by protein chains.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.