(European Union law) A decision of the European Court of Justice (ECJ) on the interpretation of European Union law, made at the request of a court or tribunal of a European Union member state.

A section of the American Psychiatric Association's code of ethics, stating that it is unethical for a psychiatrist to give a professional opinion about a public figure they have not examined in person, and whose mental health they have not received consent to discuss.

(organic chemistry) A series of guidelines outlining the relative favorabilities of ring closure reactions in alicyclic compounds.

An ecogeographic principle broadly stating that animals adapted to cold climates have relatively short limbs. Specifically, homeothermic animals in hot climates have low volume-to-surface ratios, and homeothermic animals in cold climates have high volume-to-surface ratios, due to thermal adaptation.

(idiomatic) To set the standard which guides behavior; to control a situation, group, strategy, etc.

plural of personal rule

Control by the central government of an area that has had its own governing body in the past.

(US, law) An exception to the general rule of contract law that acceptance of an offer takes place when communicated. Instead, acceptance takes effect when a letter enters the postal system.

An observation that, in a parliamentary election, the ration of seats won by each party is proportional to the cube of the percentage of the vote obtained by each party

Synonym of first past the post