No. 12,860 in Russian
лабораторного
"Лабораторного" means "of the laboratory" or "laboratory-related" in English.
In a sentence
Он изучал лабораторного крысу на уроке биологии.
He studied a laboratory rat in biology class.
In this sentence, "лабораторного" functions as the genitive case of the adjective "лабораторный" modifying the noun "крысу" to describe a special rat used for laboratory purposes.
Она работала в лабораторного отдела химии.
She worked in the laboratory department of chemistry.
Here, "лабораторного" denotes the genitive case to describe the department related to laboratory work in chemistry.
Мы посетили выставку лабораторного оборудования.
We visited an exhibition of laboratory equipment.
In this example, "лабораторного" is in the genitive case and modifies "оборудования" to specify that the equipment is used in laboratories.
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