useless trivia: What Word Means: Of The Luites Or Their Language?

Questions

- (1) A vocal or instrumental piece for three performers (e.g. a piano trio - piano, violin and 'cello); (2) The middle section of a minuet or scherzo. Originally this was written in three-part harmony and the title remained.?

- A composition usually for two violins and a 'cello, with a keyboard playing the bass line and supporting harmonies. Much favoured in the late 17th and early 18th centuries.?

- A concerto for three solo instruments with orchestra.?

- Invertible counterpoint in which three parts can be interchanged, each making a suitable bass for the other.?

- The playing of three notes simultaneously on a stringed instrument by the placing of the left hand fingers on the strings and shortening the vibrating length.?