(chemistry, physics) A complex compound, typically containing clusters of transition elements, each molecule of which acts as a small magnet.

An agreement between an employer and a union such that the union will represent all the workers at a particular workplace.

A voting system where each voter lists the candidates in order of preference and there is provision to transfer the votes of the less popular candidates and a proportion of the votes of candidates who are elected with more than a certain quota.

A component in a device, or a point in a network, that, if it were to fail would cause the entire device or network to fail; normally eliminated by adding redundancy.

Whisky made only from the malted barley of a single distillery, unblended with other whiskies.

(mathematics) Any function in which each point in the domain maps to just one point in the range

plural of single-serving site

(Internet) A simple website consisting of a single page, with a dedicated domain name, that does only one thing.

(photography) Denoting or relating to a type of camera which allows the photographer to view the subject through the same lens that will be used to take a photograph, usually by incorporating a moving mirror and prism.

plural of single-valued function