(rail transport, UK) A type of railway signal which shows the aspect of a signal ahead of it, normally used in a situation where the main signal is hidden from view, for instance where there is a curve in the track.

(genetics, medicine) Any of a group of disorders caused by stretches of DNA that contain a sequence of three nucleotides repeated many times

(informal, often humorous) Indicating that an action or process was repeated, or needs to be repeated. / (informal, satirical) Indicating that an action or process happens often and is futile.

(genetics) A pattern in DNA where two or more nucleotides are repeated and the repeated sequences are directly adjacent to each other, used in determining genetic profiles to identify an individual.

plural of trinucleotide repeat disorder

(law) repeated actual bodily harm

(genetics) Any DNA sequence that exists in multiple copies strung together in various tandem lengths.

A request for the interlocutor to repeat what the speaker says next. Often used in language training.

Foolish people repeatedly do foolish things.