D defs.my
Entry 4 senses Webster, 1913

matrix

/(mā"trĭks)/ · ma·trix · IPA /ˈmæɪ.tɹɪks/
01 n. The womb.
pl. Matrices ((măt"rĭ*sēz))
  1. 1.
    The womb.(Anat.)
    “All that openeth the matrix is mine.” — Ex. xxxiv. 19.
  2. 2.
    That which gives form or origin to anything(Mech.)
  3. 3.
    The lifeless portion of tissue, either animal or vegetable, situated between the cells; the intercellular substance.(Biol.)
  4. 4.
    A rectangular arrangement of symbols in rows and columns. The symbols may express quantities or operations.(Math.)