GNU Collaborative International Dictionary of English

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1.       
   matrix , n.; pl. Matrices . [L., fr. mater mother. See Mother, and cf. Matrice.]
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   (Anat.) The womb.
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   All that openeth the matrix is mine.
   Ex. xxxiv. 19.
   
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   Hence: That which gives form or origin to anything; as: (a) (Mech.) The cavity in which anything is formed, and which gives it shape; a die; a mold, as for the face of a type. (b) (Min.) The earthy or stony substance in which metallic ores or crystallized minerals are found; the gangue. (c) pl. (Dyeing) The five simple colors, black, white, blue, red, and yellow, of which all the rest are composed.
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   (Biol.) The lifeless portion of tissue, either animal or vegetable, situated between the cells; the intercellular substance.
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   (Math.) A rectangular arrangement of symbols in rows and columns.  The symbols may express quantities or operations.
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