marrow, bone marrow -- (the fatty network of connective tissue that fills the cavities of bones)
marrow, marrow squash, vegetable marrow -- (any of various squash plants grown for their elongated fruit with smooth dark green skin and whitish flesh)
marrow, bone marrow -- (very tender and very nutritious tissue from marrowbones)
marrow, vegetable marrow -- (large elongated squash with creamy to deep green skins)