helicity noun3 •The quality of being helical. •The quantized spin component of a moving particle along the direction of its motion.To understand this name, note that the helicity is, roughly speaking, the spin in the direction of motion. — 1989 •Any of certain measures of the extent to which vortex lines (in fluid flow) or field lines (in a magnetic or electromagnetic field) kink and twist or link and coil around one another.The conjecture made in Tsinober and Levich (1983) was that coherent structures should possess a significant coherent helicity. — 1991 formshelicities
