'Serration' definitions:

Definition of 'serration'

From: WordNet
noun
The condition of being serrated; "the serrations of a city skyline"
noun
A row of notches; "the pliers had serrations to improve the grip"
noun
A single notch in a row of notches; "one of the serrations was broken off"

Definition of 'Serration'

From: GCIDE
  • Serration \Ser*ra"tion\, n.
  • 1. Condition of being serrate; formation in the shape of a saw. [1913 Webster]
  • 2. One of the teeth in a serrate or serrulate margin. [1913 Webster]