Showing no mercy; cruel and pitiless.

(colloquial) thank you

An extra card or set of cards that is allowed to play at the end of various card games.

A businessman employed at, or a partner at a merchant bank. / (chiefly Britain, rhyming slang) A wanker. (In this sense, the term can also be abbreviated to merchant.)

A bank which provides financial services for businesses.

(chemistry) Pertaining to or derived from mercury. / (chemistry) Of a compound, containing mercury with an oxidation number of 1.

(obsolete, chemistry) Pertaining to or derived from mercury. / (chemistry) Specifically (of a compound), containing mercury with an oxidation number of 2. / (rare) Mercurial (of people).

(American spelling) Alternative spelling of mercury-vapour lamp

(British spelling) a gaseous discharge lamp in which the arc discharge takes place in mercury vapour; used for highway illumination and as an industrial source of ultraviolet radiation

(obsolete, chemistry) a dithioacetal derived from an aldehyde