the.com/leftover
Yesterday's dinner, applying for a second term in your fridge.
means Food remaining after a meal, saved to be eaten later — often better the next day.
from From Middle English left over, literally what is left when the eating stops; the noun sense solidified in the 1800s once iceboxes made saving food practical.
Flavor scienceStews taste better as flavors meld overnight.
Thanksgiving truthThe aftermath outlasts the actual feast for days.
Beyond foodMath borrows it: the leftover is a remainder.