Definition - What does Spur mean?
Spurs are stubby and short side stems that protrude from the main stem on woody plants that are usually in their second year. The fruit of pears and apples form on the spurs of a tree.
MaximumYield explains Spur
Because spurs are important to fruit bearing trees and some vines, pruning techniques are normally used that will encourage their formation. In a vineyard grapes are often pruned down to the spur to increase fruit production.
Flowering trees can also be pruned to encourage spur growth and improve blooming.