1 (also vegetable marrow)British a long white-fleshed gourd with green skin, which is eaten as a vegetable.
2the plant of the gourd family which produces marrows.
Cucurbita pepo, family Cucurbitaceae
Cucurbita pepo, family Cucurbitaceae
3 (also bone marrow) [mass noun] a soft fatty substance in the cavities of bones, in which blood cells are produced: [as modifier]:marrow donorsa bone marrow transplant
4the essential part of something:such men were the marrow of the organization
to the marrow
to one’s innermost being:a sight which chilled me to the marrow