City Sign Midfielder Moreno
City beat off competition from a number of clubs, including Championship rivals Hull City, to secure Moreno's signature.
Moreno becomes Paulo Sousa's third signing since being appointed manager, following the captures of defender Miguel Vitor and Slovenian striker Leon Crncic.
Moreno is predominantly a central midfielder but can also play in defence.
The 29 year old has made 116 appearances for Portuguese top flight side Vitoria de Guimaraes, scoring three goals.
Moreno began his career at F.C Felgueiras before moving to Macedo Cavaleiros and then Cacadores Taipas where he played 65 times, scoring three times.
City boss Paulo Sousa was delighted to bring Moreno to the club, and says the midfielder will add something different to the squad.
"Moreno is a player with a lot of experience at the top level of Portuguese football, and he will give us another dimension.
He is a strong player, and can play as either a defender or in the midfield. I am pleased we have been able to sign him."