Definition/Meaning  Word/Phrase 
(mathematics) any number such that a given square matrix minus that number times the identity matrix has a zero determinant 
characteristic root of a square matrix
,
eigenvalue
,
eigenvalue of a matrix
,
eigenvalue of a square matrix

matrix giving the correlations between all pairs of data sets 
correlation matrix

table or matrix of all contingencies and the actions to be taken for each 
decision table

square matrix used to solve simultaneous equations 
determinant

(mathematics) a set of entries in a square matrix running diagonally either from the upper left to lower right entry or running from the upper right to lower left entry 
diagonal

square matrix with all elements not on the main diagonal equal to zero 
diagonal matrix

changing a square matrix to diagonal form (with all nonzero elements on the principal diagonal) 
diagonalisation
,
diagonalization

rectangular matrix of dots from which written characters can be formed 
dot matrix

printer that represents each character as a pattern of dots from a dot matrix 
dot matrix printer
,
dot printer
,
matrix printer

type of passive matrix display in which the top and bottom half of the screen are refreshed simultaneously 
dual scan display

any of several methods for reducing correlational data to a smaller number of dimensions or factors; beginning with a correlation matrix a small number of components or factors are extracted that are regarded as the basic variable that account for the int 
factor analysis

matrix of finegrained crystalline material in which larger crystals are embedded 
groundmass

scalar matrix in which all of the diagonal elements are unity 
identity matrix
,
unit matrix

square matrix of n rows and columns; cells contain n different symbols so arranged that no symbol occurs more than once in any row or column 
Latin square

square matrix of n rows and columns; the first n^2 integers are arranged in the cells of the matrix in such a way that the sum of any row or column or diagonal is the same 
magic square

diagonal of a square matrix running from the upper left entry to the lower right entry 
main diagonal
,
principal diagonal

determination of a matrix that when multiplied by the given matrix will yield a unit matrix 
matrix inversion

interchange of each row of a square matrix with the corresponding column 
matrix transposition

casting matrix 
mold

cast iron consisting of graphite in a matrix of austenite 
Niresist
,
Niresist iron
