allegro [I]—fast, lively tempo. From the Italian word for cheerful or gay.
andante [I]—moderately slow tempo (e.g. walking). Faster than adagio but slower than allegretto
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
con [I,S]—with
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
piano trio, Klaviertrio [G], Trio avec piano [F]—ensemble comprising violin, cello, and piano or a composition for such an ensemble. Second only to the string quartet as an essential genre, form, and ensemble of chamber music, filling a large part of the classic and modern repertoire with contributions from nearly every important composer. Explore the piano trio | wiki
tema con variazioni, con variazioni, Tema e variazioni, theme and variations, Thema mit Variationen [G], Thème varié [F]—a common movement form featuring an initial theme followed by a series of variations on that theme, each of which adjusts any number of parameters to achieve variety, e.g. tempo, rhythm, key, instrumentation, etc.A challenge to the composers ingenuity and a delight for the listener
theme, tema [I], Thema [G]—a complete and recognizable musical entity (e.g. melody) used as the basis for elaboration (e.g. variations, sontata, fugue, etc.). Also called a subject. Motif (motive) is generally a smaller fragmentary entity.
trio (1)—an ensemble or work for 3 players
variation, variazione, variatio, variato, variata—a modified re-iteration of a previous theme, reprise, couplet, etc. The music is varied, embellished or creatively transformed for variety while maintaining a unity relationship with the original. See "Theme and Variations."