What Does It Mean?

You are correct!

From our dictionary:
spu•ri•ous

(spyoor'Eus),
adj.
1. not genuine, authentic, or true; not from the claimed, pretended, or proper source; counterfeit.
2. Biol.(of two or more parts, plants, etc.) having a similar appearance but a different structure.
3. of illegitimate birth; bastard.