albumblatt [G], albumblätter—Album leaf / leaves. A common title for a small, single movement character piece, especially one of many
chamber music, Kammermusik [G], musique de chambre [F], musica da camera [I], musica cameralis [L]—"Classical Music" for a small ensemble, generally 8 or fewer players with a canonical emphasis on 3-6 players. explore
duo, duet, dueto [S], duetto [I], duett [G]—a work for two instruments; the ensemble itself
elegy, elégie [F], elegie [G], elegisch, elegiaco, elegaico [I], élégiaque [F], elegia—a plaintive, mournful poem, more specifically a lament for the dead. Usually implies a slow tempo, a minor key and a dark poignancy with potential spikes of tragic agony or, just as well, a gentle, bright flowering into nostalgic love of great tenderness. A musical narrative combining all of these moods is a hauntingly faithful representation of grief
intermezzo, intermedio [S], intermède [F], interlude, Entr'acte—music that is "inserted" (or "interpolated) between two musical entities of greater importance (e.g. movements, acts, verses, etc.). Often suggests music of a lighter character, entertaining contrast or even improvisation.
klein [G], kleine—small, little
mazurka, mazourka—a series of Polish folk dances in triple meter, which originated in the plains of Mazovia around Warsaw. The people of the province were called Mazurs. wiki
opus [L], opera[pl], Op., Opp, WoO, Op. posth—work, as in a work of art. For unique identification, publishers/composers often assign an "opus number", abbreviated as "Op." (e.g. Op. 1). A range of works by opus number, uses the plural "opp." (e.g. "Opp. 1-3"). A single opus number may refer to a collection of works (e.g. a set of quartets) giving rise to designations like "Op. 1, No. 4". For misc. works without opus numbers, "WoO" is often used (e.g."Without Opus"). Posthumously assigned numbers may use "Op. posth". Opus numbers may not precisely reflect chronology (publication vs. composition), can be erroneous, sparse or duplicative. Thus, the works of some historically important composers may use separate catalog numbers (e.g. Bach, Haydn, Schubert). See wiki
prelude, prélude, präludium [G], präludien [G, pl], praeludium, preludio—a movement preceding another almost by way of introduction: to let listeners and players acclimate, often to prepare for greater demands ahead