Marrow

n.	1.
	1.	(Anat.) The tissue which fills the cavities of most bones; the medulla. In the larger cavities it is commonly very fatty, but in the smaller cavities it is much less fatty, and red or reddish in color.
	2.	The essence; the best part. It takes from our achievements . . . The pith and marrow of our attribute. - Shak.
	3.	One of a pair; a match; a companion; an intimate associate. Chopping and changing I can not commend, With thief or his marrow, for fear of ill end. - Tusser. Marrow squash (Bot.) a name given to several varieties of squash, esp. to the Boston marrow, an ovoid fruit, pointed at both ends, and with reddish yellow flesh, and to the vegetable marrow, a variety of an ovoid form, and having a soft texture and fine grain resembling marrow. Spinal marrow (Anat.) See Spinal cord, under Spinal.
v. t.	1.	To fill with, or as with, marrow or fat; to glut. [imp. & p. p. Marrowed ; p. pr. & vb. n. Marrowing.]

Noun	1.	marrow - the fatty network of connective tissue that fills the cavities of bones Synonyms: bone marrow
	2.	marrow - any of various squash plants grown for their elongated fruit with smooth dark green skin and whitish flesh Synonyms: marrow squash, vegetable marrow
	3.	marrow - very tender and very nutritious tissue from marrowbones Synonyms: bone marrow
	4.	marrow - large elongated squash with creamy to deep green skins Synonyms: vegetable marrow
	5.	marrow - 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" Synonyms: essence, heart and soul, inwardness, nitty-gritty, pith, gist, kernel, meat, substance, nub, sum, core, center, heart

abatis, axiom, axis, bottom, brains, center of action, center of gravity, centroid, centrum, chitterlings, cockscomb, dead center, distillate, distillation, elixir, epicenter, essence, essentiality, fabric, flower, focus, fundamental, giblets, gizzard, gravamen, haslet, heart, hub, hypostasis, inner essence, kernel, kidneys, liver, material, matter, meat, medium, medulla, metacenter, middle, nave, navel, nub, nucleus, nuts and bolts, omphalos, pith, pivot, postulate, principle, quid, quiddity, quintessence, quintessential, sap, soul, spirit, storm center, stuff, substance, sum and substance, sweetbread, the nitty-gritty, tongue, tripe, umbilicus, virtuality