tvorevina

1. creation; product
   Taj lik je čista tvorevina mašte. — That character is a pure figment of the imagination.
   Jezik je tvorevina mnogih generacija. — Language is the creation of many generations.
2. (of nature, states) formation; entity
   Ova pećina je zanimljiva geološka tvorevina. — This cave is an interesting geological formation.
   Nova državna tvorevina nije dugo trajala. — The new state entity did not last long.

Often used in tvorevina mašte, "a figment of the imagination".