How to Say "breeding male" in Spanish
The Spanish word for “breeding male” is “semental” — B1 level.

Examples
El granjero compró un caballo semental de pura raza.
The farmer bought a purebred stud horse.
Este toro es el principal semental de la ganadería.
This bull is the main breeding male of the cattle ranch.
Buscamos un perro semental para cruzarlo con nuestra mascota.
We are looking for a stud dog to breed with our pet.
Always Masculine
The word 'semental' is always masculine because it refers to male animals used for breeding. There is no female version of this specific word.
Using as a Noun or Adjective
You can use it as a noun (El semental) or as a descriptive word after the animal's name (Un caballo semental).
Don't use it for any male animal
Mistake: “Calling a regular male pet a 'semental' just because it is male.”
Correction: Only use 'semental' if the animal is specifically kept for the purpose of breeding or is a high-quality sire.
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