(organic chemistry) A decomposition product of chlorophyll.

(historical) A period between circa 4000 to 3100 BC which saw the emergence of urban life in Mesopotamia and the Sumerian civilization.

Alternative spelling of double-plus-good

A town and civil parish of Fife council area, Scotland (OS grid ref NT2686). / A community in the township of King, Ontario, Canada. / A habitational surname from Scottish Gaelic.