Is an imaginary line, which indicates a direction through a crystal structure about which the structure can be rotated to appear identical 2,3,4 or 6 times during one complete revolution.
Found on
http://gemologyonline.com/gemology_dictionary.htm
(from the article `quasicrystal`) Fivefold symmetry axes are forbidden in ordinary crystals, while other axes, such as sixfold axes, are allowed. The reason is that translational ... An axis is an imaginary centre line through a symmetrical or near symmetrical volume or group of volumes that suggests the gravitational pivot of the ... ...
Found on
http://www.britannica.com/eb/a-z/a/132
An axis through a particle (e.g., a virus) on such a plane that, if the particle is rotated on the axis, there are two or more positions at which the particle appears identical. ... (05 Mar 2000) ...
Found on
http://www.encyclo.co.uk/local/20973
An imaginary line drawn through the center of a crystal that replicates the exact shape if the crystal is turned to 360
Found on
http://www.encyclo.co.uk/local/22290
Type: Term Definitions: 1. an axis through a particle (a virus) on such a plane that, if the particle is rotated on the axis, there are two or more positions at which the particle appears identical.
Found on
http://www.medilexicon.com/medicaldictionary.php?t=8979
A line that passes through a graph or figure such that one side of the figure is an exact mirror image of the other.
Found on
https://www.encyclo.co.uk/local/20687
a straight line for which every point on a given curve has corresponding to it another point such that the line connecting the two points is bisected by the given line. · See
Found on
https://www.infoplease.com/dictionary/axis-of-symmetry
No exact match found.
