This is the 704th most frequent Serbian word.
стручног
The Serbian word "стручног" translates to "professional" or "expert" (adjective, genitive case).
Here, 'стручног' is used as an adjective describing the lecturer, indicating their expertise in a specific field.
Имамо предавача стручног за економију.
We have a lecturer who is an expert in economics.
In this sentence, 'стручног' qualifies a person, showing the requirement for someone with specific professional knowledge.
Потребан нам је савет неког стручног у медицини.
We need advice from someone knowledgeable in medicine.
Here, 'стручног' is part of a term describing the nature of the course, emphasizing its professional aspect.