Jacob Murphy boosts attacking options.
Norwich City agreed to the move on Friday, and Murphy made his debut in the match against Crawley.
It follows hot on the heels of Bongani Khumalo coming to the Weston Homes Community Stadium from Spurs, boosting the U's squad ahead of the run in to the end of the season.
Murphy signed a three and a half year contract in December 2013, along with his twin brother Josh, and has spent time on loan at Blackpool and Scunthorpe this season.
The twenty year old adds an attacking option for the U's, who will have the winger's services for the rest of the campaign.