
In geometry, a triple helix (plural triple helices) is a set of three congruent geometrical helices with the same axis, differing by a translation along the axis. As with a single helix, a triple helix may be characterized by its pitch and diameter. Structures in the form of a triple helix include: ...
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http://en.wikipedia.org/wiki/Triple_helix

The superhelix formed (right-handed) from three individual collagen helices (each being left-handed). ... (05 Mar 2000) ...
Found on
http://www.encyclo.co.uk/local/20973

Type: Term Definitions: 1. the superhelix formed (right-handed) from three individual collagen helices (each being left-handed).
Found on
http://www.medilexicon.com/medicaldictionary.php?t=39666
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