"marrow" in the noun sense
1. marrow, bone marrow
the fatty network of connective tissue that fills the cavities of bones
2. marrow, marrow squash, vegetable marrow
any of various squash plants grown for their elongated fruit with smooth dark green skin and whitish flesh
3. marrow, bone marrow
very tender and very nutritious tissue from marrowbones
4. marrow, vegetable marrow
large elongated squash with creamy to deep green skins
5. kernel, substance, core, center, centre, essence, gist, heart, heart and soul, inwardness, marrow, meat, nub, pith, sum, nitty-gritty
the choicest or most essential or most vital part of some idea or experience
"the gist of the prosecutor's argument"
"the heart and soul of the Republican Party"
"the nub of the story"
Source: WordNet® (An amazing lexical database of English)
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