Crossword Genius

Mould; array (6)

Ross

I believe the answer is:

matrix

I believe this clue is a double definition.

'mould' is the first definition.
(I know that matrix is a type of mould)

'array' is the second definition.
(I know that matrix is a type of array)

(Other definitions for matrix that I've seen before include "Grid-like pattern of elements" , "Mould; lattice" , "Casting mould" , "Rectangular array of mathematical data set out in rows and columns" , "Rectangular array of quantities or symbols" .)

I've seen this clue in The Times.
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