noun ·Uncommon ·Advanced level

Definitions

Noun

1. 1
   The soft inner part of something, especially the pith of a fruit.
2. 2
   the inner part of an organ or structure in plant or animal wordnet
3. 3
   The inner substance of various organs and structures, especially the marrow of bones.
4. 4
   lower or hindmost part of the brain; continuous with spinal cord; (‘bulb’ is an old term for medulla oblongata) wordnet
5. 5
   The medulla oblongata.

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6. 6
   a white fatty substance that forms a medullary sheath around the axis cylinder of some nerve fibers wordnet
7. 7
   The internal tissue of a plant.

Synonyms

All synonyms

pithaxisbulbcentercoreheart

Antonyms

All antonyms

cortex

Example

More examples

"Central nervous system consists of brain, cerebellum, medulla oblongata and spinal cord."

Etymology

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

Related phrases

medulla oblongatarenal medullamedulla oblongata

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.