Princeton's WordNet
marrow, marrow squash, vegetable marrownoun
any of various squash plants grown for their elongated fruit with smooth dark green skin and whitish flesh
Synonyms:
marrow squash, nitty-gritty, meat, core, inwardness, bone marrow, sum, gist, heart and soul, substance, nub, center, centre, kernel, essence, heart, vegetable marrow, marrow, pith
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