The bittern is a water bird famous for its booming call. It was eaten up until the 17th Century in the United Kingdom but is now extremely rare, though reviving a little.

A bitter, thin-skinned Seville orange (US: bitter orange) used for marmalades. The peel is useful in sauces and syrups.

Guinness is the classic example.

A mollusc with two shells hinged around the creature housed within them, such as a clam, oyster or mussel.

Anatto. A food colouring extracted from small reddish-brown seeds contained in a prickly seed pod, the fruit of a tropical South American tree. Although edible, it has little flavour and its culinary value is on the whole limited to colouring properties. It is used to give yellow-red colour to charcuterie, Edam, Mimolette, Cheshire and Cheddar cheese, and dried fish such as haddock as well as pastries, sweets and butter. In some places the seeds are fried in lard to impart their red colour and then discarded. The fat is then cooled and used for cooking and colouring other foods.

Black is a colour. Or the absence of colour.

A variety of abalone with a large, smooth, dark shell found on the West Coast of north America.