Medical Dictionary

matrix ma·trix (mā'trĭks)
n. pl. ma·trix·es or ma·tri·ces (mā'trĭ-sēz', māt'rĭ-)

  1. A surrounding substance within which something else originates, develops, or is contained.

  2. The womb.

  3. The formative cells or tissue of a fingernail, toenail, or tooth.

  4. See ground substance.

  5. A specially shaped instrument, plastic material, or metal strip for holding and shaping the material used in filling a tooth cavity.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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