marrow
The substance inside bones which produces blood cells.
Other meanings
A kind of vegetable similar to a large courgette, zucchini or squash; the mature fruit of certain Cucurbita pepo cultivars.
The pith of certain plants.
Word history
From Old English "mearg".
Where this comes from
This definition is adapted from “marrow” on Wiktionary, by its contributors, published under CC BY-SA 4.0. This page is published under the same licence.