Necker and the Estates-General. In the wake of Calonneâs dismissal, Louis XVI brought back Swiss banker Jacques Necker, who had previously served a ten-year stint as director general of finance.
Wiktionary (0.00 / 0 votes) Rate this definition: helix (Noun). A curve on the surface of a cylinder or cone such that its angle to a plane perpendicular to the axis is constant; the three-dimensional curve seen in a screw or a spiral staircase.helix (Noun). A small volute under the abacus of a Corinthian capital.iktionary (0.00 / 0 votes) Rate this definition: helix (Noun). A curve on the surface of a cylinder or cone such that its angle to a plane perpendicular to the axis is constant; the three-dimensional curve seen in a screw or a spiral staircase.
The alpha helix (Î±-helix) is a common secondary structure of proteins and is a righthand-coiled or spiral conformation (helix) in which every backbone N-H group donates a hydrogen bond to the backbone C=O group of the amino acid four residues earlier (hydrogen bonding).ince the Î±-helix is defined by its hydrogen bonds and backbone conformation, the most detailed experimental evidence for Î±-helical structure comes from atomic-resolution X-ray crystallography such as the example shown at right.