Senesi made his international debut for Argentina against Estonia in June.

"The fact he has chosen to come here is a clear sign of our appeal as a football club," said Bournemouth chief executive Neill Blake.

Senesi is Bournemouth's fifth signing of the summer following their return to the Premier League.

"Bringing in a current Argentina international with experience in European competitions is another indication of the club's ambition," added Blake.

"This is a huge signing for us and Marcos brings significant pedigree to our squad."

The Cherries beat Aston Villa 2-0 in their opening match of the season.