medulla

Etymology

Borrowed from Latin medulla (“pith, marrow”), perhaps from medius (“middle”).

noun

  1. The soft inner part of something, especially the pith of a fruit.
  2. (anatomy) The inner substance of various organs and structures, especially the marrow of bones.
  3. (anatomy, neuroanatomy) The medulla oblongata.
  4. (botany) The internal tissue of a plant.

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