A preparation of calcareous earth, in the form of a brick, used for cleaning knives etc.

An early (and dangerous) form of tanning bed.

The time that a battery lasts

The salted smoked cheek and jawbones of a pig, used as food.

(bridge) A coup where the declarer, holding AJx in a suit, ducks the left-hand opponent's lead of a king or queen.

A rare, fatal autosomal-recessive neurodegenerative disorder that begins in childhood.

Batten disease

(literally) Acid used as electrolyte in a battery, usually sulphuric acid. / (military slang) Coffee.

(humorous) An attempt to avert weight gain or obesity. / (humorous) An attempt to conceal one's erection.

(usually in the plural) bath salts in the form of a small sphere that dissolves when placed in water