The dystonias are movement disorders in which sustained muscle contractions cause twisting and repetitive movements or abnormal postures. The movements, which are involuntary and sometimes painful, may affect a single muscle; a group of muscles such as those in the arms, legs, or neck; or the entire body.
Definition of Data Clustering. Data Clustering is the classification of a data set into a group of numbers, where members of each group surround a particular number.efinition of Data Clustering. Data Clustering is the classification of a data set into a group of numbers, where members of each group surround a particular number.
Â© 2015 MathsIsFun.com v0.86. A line segment connecting two points on a curve. Example: the line segment connecting two points on a circle's circumference is a chord. When the chord passes through the center of a circle it is called the diameter. See: Diameter