- marrow, bone marrow - the fatty network of connective tissue that fills the cavities of bones
--1 is a kind of connective tissue
--1 is a part of bone, os; immune system
--1 has particulars: red marrow, red bone marrow; yellow marrow, yellow bone marrow - marrow, bone marrow - very tender and very nutritious tissue from marrowbones
--2 is a kind of dainty, delicacy, goody, kickshaw, treat
--2 is a part of marrowbone