The substance inside bones which produces blood cells.
The inner meaning or purpose.
The pith of certain plants.
Bone marrow biopsy.
The essence; the best part.
A friend, pal, buddy, mate.
A kind of vegetable like a large courgette/zucchini or squash.
The inner substance of various organs and structures, especially the marrow of bones.
The medulla oblongata.
The soft inner part of something, especially the pith of a fruit.
The internal tissue of a plant.