A spiral, staircase-like structure with a repeating pattern described by two simultaneous operations (rotation and translation). It is one of the natural conformations exhibited by biological polymers.
Any structure with a spiral shape. The Watson and Crick model of DNA is in the form of a double.
The curved outer edge of the ear.
Coil-shaped part; the hereditary material DNA (deoxyribonucleic acid) has a double-helix configuration.
The outer curved fleshy ridge of the pinna of the outer ear.
Spiral shape of a coiled protein created by polypeptide chains that intertwine with each other.