adult male, man - an adult male person (as opposed to a woman); "there were two women and six men on the bus"

nodule - (mineralogy) a small rounded lump of mineral substance (usually harder than the surrounding rock or sediment)

nugget - a solid lump of a precious metal (especially gold) as found in the earth

piece, part - a portion of a natural object; "they analyzed the river into three parts"; "he needed a piece of granite"