IPA: /ˈoʊpəsˌkjuːləm/
KK: /ˈoʊpəsˌkjuːləm/
A small or minor work, especially in literature or art.
The author published an opuscule that explored the themes of nature and humanity.
Opusculum is derived from "opus" (meaning work) and the diminutive suffix "-culum" (indicating smallness). Thus, opusculum refers to a small work or a minor piece of literature or art.
Think of 'opus' meaning work, and the '-culum' suggesting something small — so an opusculum is a small work.