1. (n.) 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. (n.) The essence; the best part.

3. (n.) One of a pair; a match; a companion; an intimate associate.

4. (v. t.) To fill with, or as with, marrow of fat; to glut.

abatis axiom axis bottom brains center center of action center of gravity centroid centrum chitterlings cockscomb core dead center distillate distillation elixir epicenter essence essential essentiality fabric flower focus fundamental giblets gist 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