Screw axis — The screw axis (helical axis or twist axis) of an object is a parameter for describing simultaneous rotation and translation components of that object.The axis is a directed line in space, along which a translation may occur, and about which… … Wikipedia
screw axis — /ˈskru æksəs/ (say skrooh aksuhs) noun an axis of symmetry about which the atoms in a crystal lattice are arranged …
screw axis — Crystall. 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. [1900 05] * * * … Universalium
screw axis — Crystall. 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. [1900 05] … Useful english dictionary
Symmetry — For other uses, see Symmetry (disambiguation) … Wikipedia
Symmetry group — Not to be confused with Symmetric group. This article is about the abstract algebraic structures. For other meanings, see Symmetry group (disambiguation). A tetrahedron can be placed in 12 distinct positions by rotation alone. These are… … Wikipedia
Symmetry operation — In the context of molecular symmetry, a symmetry operation may be defined as a permutation of atoms such that the molecule or crystal is transformed into a state indistinguishable from the starting state. Two basic facts follow from this… … Wikipedia
Rotational symmetry — Generally speaking, an object with rotational symmetry is an object that looks the same after a certain amount of rotation. An object may have more than one rotational symmetry; for instance, if reflections or turning it over are not counted, the … Wikipedia
Symmetrieschraubenachse — sraigtinė simetrijos ašis statusas T sritis fizika atitikmenys: angl. screw axis of symmetry vok. Symmetrieschraubenachse, f rus. винтовая ось симметрии, f pranc. axe de symétrie hélicoïdal, m … Fizikos terminų žodynas
axe de symétrie hélicoïdal — sraigtinė simetrijos ašis statusas T sritis fizika atitikmenys: angl. screw axis of symmetry vok. Symmetrieschraubenachse, f rus. винтовая ось симметрии, f pranc. axe de symétrie hélicoïdal, m … Fizikos terminų žodynas