This is the 16428th most frequent Russian word.
российско
"Российско" means "Russian" or "related to Russia (as a state)."
The word 'российско' here is used as part of a compound word to denote the bilateral relationship or shared entity involving Russia ('российско') and another party, in this case America.
Российско-американское сотрудничество имеет большое значение.
Russian-American cooperation is very significant.
The word 'российско' is used in a compound adjective to describe technology involving contributions or design from Russia ('российско') and Japan.
На выставке была представлена российско-японская техника.
At the exhibition, Russian-Japanese technology was showcased.
Here, 'российско' serves as a component of a compound adjective to describe the delegation formed or associated with Russia ('российско') as well as Finland.