The Manual of Heraldry
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Chapter III.
Lines Used in Parting the Field.
Escutcheons that have more than one tincture are divided by lines; the straight lines are either perpendicular |, horizontal — , diagonal line dexter \, and diagonal line sinister /.
Curved and angular lines are numerous, and each has an Heraldic name expressive of its form. The names and figures of those most commonly used by English armorists are as follow: --
Engrailed 
Invected 
Wavy, or undé 
Embattled, or crenelle 
Nebule 
Indented 
Dancette