noun
(uncountable) The substance inside bones which produces blood cells.
A kind of vegetable similar to a large courgette, zucchini or squash.
The pith of certain plants.
(figurative) The essence; the best part.
(figurative) The inner meaning or purpose.
(countable, medicine, colloquial) Bone marrow biopsy.
(uncountable, obsolete) Semen.
noun
(Geordie, informal) A friend, pal, buddy, mate.
(mining, slang, obsolete) A miner's mate or assistant.
(Scotland or archaic) One of a pair; a match; a companion; an intimate associate.