Noun
tray table (plural tray tables)
Alternative form of tray-table
A small, tray-shaped table used to place small objects upon, and most commonly used to place meals on while watching television.
A fold-away tray, such as those found in front of airline seats.
Source: en.wiktionary.orgtray-table
As well as the generous seat width of 19.7” and pitch of 35”, all seats have an in-arm tray table which folds in half to become a handy cup holder. Source: Internet
The pillow is easily converted into an iPad stand that can rest comfortably on a tray table, and measures 9 inches wide by 6 inches high. Source: Internet