Word of the Day:

: a minor work (as of literature)

The book is a collection of opuscula written by the author between his two major novels.

"Opusculum" -- which is often used in its plural form "opuscula" -- comes from Latin, where it serves as the diminutive form of the noun "opus," meaning "work." In English, "opus" can refer to any literary or artistic work, though it often specifically refers to a musical piece. Logically, then, "opusculum" refers to a short or minor work. ("Opusculum" isn't restricted to music, though. In fact, it is most often used for literary works.) The Latin plural of "opus" is "opera," which gave us (via Italian) the word we know for a musical production consisting primarily of vocal pieces performed with orchestral accompaniment. We can also thank "opus" for our verb "operate."