Renaissance - The period c. 1450-1600.
Second - The second degree of the diatonic scale. Also, the interval formed by a given tone and the next tone above or below it, e.g. c up to d, or c down to b. Intervals of the second may be major, diminished, or augmented.
Terraced dynamics - The Baroque style of using sudden changes in dynamic levels, as opposed to gradual increase and decrease in volume.
Affrettando - Hurrying.
Battuto - Beat, bar, or measure. A due or a tre battuta, the musical rhythm in groups of two or three respectively.