IPA: /ˌbaɪoʊsɪnˈθɛtɪk/
KK: /baɪoʊsɪnˈθɛtɪk/
Relating to the process by which living organisms produce complex compounds from simpler ones.
The researchers are studying biosynthetic pathways to develop new medicines.
Biosynthetic → It is formed from "bio-" (from Greek "bios", meaning life) and "synthetic" (from Greek "synthesis", meaning putting together). The word refers to processes that put together or create compounds in living organisms.
Think of 'life' ('bio-') being 'put together' ('synthetic') — that's what biosynthetic means.