It's another term for a spiral, especially when talking about spiraled strands of DNA
In Christ's 
words in Matthew 7:7, Ask and it will be given to you; seek and... [DOC] [TLE] DNA: Fun facts - Home Science Tools [PAR] These instructions are divided into segments along a strand of DNA and are 
called ... Each half of the original DNA still has a base attached to its sugar-
phosphate backbone.