noun

• (uncountable) The substance inside bones which produces blood cells.
• (countable) A kind of vegetable like a large courgette/zucchini or squash.
• The pith of certain plants.
• The essence; the best part.
• The inner meaning or purpose.
• (medicine, colloquial) Bone marrow biopsy.
• (obsolete) Semen.
• (Tyneside, 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.
• A surname.