marrow
noun(mar-row)
any of various squash plants grown for their elongated fruit with smooth dark green skin and whitish flesh
Synonyms: marrow squash, vegetable marrow, 
marrow
noun(mar-row)
the fatty network of connective tissue that fills the cavities of bones
Synonyms: bone marrow, 
marrow
noun(mar-row)
large elongated squash with creamy to deep green skins
Synonyms: vegetable marrow, 
marrow
noun(mar-row)
the choicest or most essential or most vital part of some idea or experience
Synonyms: center, 
centre, 
core, 
essence, 
gist, 
heart, heart and soul, 
inwardness, 
kernel, 
meat, nitty-gritty, 
nub, 
pith, 
substance, 
sum, 
 marrow
noun(mar-row)
very tender and very nutritious tissue from marrowbones
Synonyms: bone marrow,