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The Collaborative International Dictionary of English v.0.48 (gcide)

matrix \ma"trix\ (m[=a]"tr[i^]ks), n.; pl. {Matrices}
(m[a^]t"r[i^]*s[=e]z). [L., fr. mater mother. See {Mother},
and cf. {Matrice}.]
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1. (Anat.) The womb.
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All that openeth the matrix is mine. --Ex. xxxiv.
19.
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2. 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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3. (Biol.) The lifeless portion of tissue, either animal or
vegetable, situated between the cells; the intercellular
substance.
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4. (Math.) A rectangular arrangement of symbols in rows and
columns. The symbols may express quantities or operations.
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