(US, idiomatic) A state of the United States where the Libertarian Party is influential.

A Eurasian and northwest-African aquatic iris, Iris pseudacorus.

Limax flavus (syn. Limacus flavus), a species of air-breathing land slug with a yellow body.

plural of yellow boy

(countable, slang, now archaic, historical) A gold coin; a guinea or sovereign. / (uncountable, slang) Iron(III) hydroxide, a yellow-orange solid found in acidic water from mining projects.

A brilliant yellow pigment consisting of plumbic iodide.

A product intermediate between visual purple and visual white, formed by the photochemical action of light on visual purple.

Muntz metal / (UK, auctions) Gold (or some alloy of gold) that cannot be labelled as gold in the UK because it does not bear an Assay Office mark.

Any of various plants of the genus Barbarea, with yellow flowers.

A yellow pigment, consisting essentially of sulfide and oxide of arsenic.