назъбване означава в английски

indent▼(A cut or notch )
noun
[UK: ɪn.ˈdent] [US: ˌɪn.ˈdent]

indentation [indentations]▼(act of indenting or state of being indented)
noun
[UK: ˌɪn.den.ˈteɪʃ.n̩] [US: ˌɪn.ˌden.ˈteɪʃ.n̩]

notch [notches]▼(indentation)
noun
[UK: nɒtʃ] [US: ˈnɑːtʃ]