bromide

Concise Oxford English Dictionary © 2008 Oxford University Press:
bromide /ˈbrəʊmʌɪd/

▶noun

• 1 Chemistry a compound of bromine with another element or group: methyl bromide.

• 2 a reproduction or piece of typesetting on bromide paper.

• 3 dated a sedative preparation containing potassium bromide.

• 4 a trite statement intended to soothe or placate.

– derivatives
bromidic adjective.