A city on the north coast of Haiti.

(humorous) A metaphorical piece of headgear supposedly worn by a person to assist them in thinking about how to solve a problem.

A market-based approach to control pollution by providing economic incentives for achieving reductions in emissions, participating companies being assigned an emissions quota that can be traded with others if not used.

(geology) A carbonate unit immediately overlaying a glacial diamictite, found only in sediments deposited immediately after a Snowball Earth episode.

(India) A balaclava.

flat cap

The mushroom Coprinopsis atramentaria, edible but poisonous when consumed with alcohol.

A limit on the percentage of the total vote that voters of a particular classification can make.

Any of various edible fungi in the genus Lactarius (the milk-caps), prized for their sweet taste.

A ceremonial cap of crimson velvet lined with ermine, worn or carried as a sign of nobility or special honour.