- Marrow is defined as an innermost, choice part, especially the fatty tissue inside bones.
An example of marrow is the substance in bones that can be donated to a sick person in need of a blood marrow transfusion.
Bones cut to reveal the marrow inside.
- the soft, vascular, fatty tissue that fills the cavities of most bones
- the innermost, essential, or choicest part; pith
- Brit. vegetable marrow
Origin of marrowMiddle English merow ; from Old English mearg, akin to German mark, marrow ; from Indo-European base an unverified form mozgho-, marrow, brains from source Sanskrit majján-, marrow
- Bone marrow.
- The spinal cord.
- The marrow squash.
- a. The inmost, choicest, or essential part; the pith.b. Strength or vigor; vitality.
Origin of marrowMiddle English marow, from Old English mearg.
From Old Norse margr.