screw axis
noun Crystallography.
a symmetry element of a space group such that a rotation of the lattice about the axis and a translation of the lattice some fraction of the lattice's unit distance brings the lattice back to its original position.
Origin of screw axis
First recorded in 1900–05
Words nearby screw axis
screever,
screigh,
screw,
screw around,
screw auger,
screw axis,
screw bean,
screw cap,
screw conveyor,
screw eye,
screw fly