Classical - Music conforming to certain form and structure. Usually music composed during the period 1770-1825.
Dolcissimo - Very sweetly.
Middle Ages - European historical period between roughly A.D. 500 and 1450.
Plagal cadence - Sometimes called the "amen" cadence. The chordal progression of subdominant to tonic, in a major key IV-I, in minor iv-i.
Roll - On percussion instruments, a sticking technique consisting of a rapid succession of notes: