back·prop·a·ga·tion 
(băkprŏp′ə-gāshən)
(băkprŏp′ə-gāshən)n.
A common method of training a neural net in which the initial system output is compared to the desired output, and the system is adjusted until the difference between the two is minimized.
- short-circuit
- short-circuit current
- shortcoming
- short covering
- shortcut
- short-day
- short division
- shorten
- shortened form
- shortener
- shortening
- Shorter
- shortfall
- short for
- short fuse
- short game
- shorthair
- short-haired
- shorthand
- short-handed
- short haul
- short-haul
- shorthorn
- short-horned grasshopper
- short hundredweight