This is the 11062nd most frequent Portuguese word.
lançados
"Thrown" or "launched."
In this sentence, 'lançados' is used as the past participle of the verb 'lançar' (to release), modifying 'books' (livros) to indicate that they have been released.
Os alunos rapidamente leram os livros lançados neste semestre.
The students quickly read the books released this semester.
Here, 'lançados' serves as the past participle of 'lançar', giving the meaning that the rockets (foguetes) were launched.
Os foguetes foram lançados exatamente ao meio-dia.
The rockets were launched exactly at noon.
In this example, 'lançados' appears in the future passive construction to describe the anticipated release of products.