Irregular, as if gnawed away

• Having irregular edges
• Gnawed around the edges
• Gnawed leaf, e.g
• Irregularly incised
• Rough-edged
• Uneven, as a leaf edge
• Like some shorelines
• Jagged, as a leaf's edge
• Like some leaf edges

Wiktionary Word definitions in Wiktionary
a. Irregularly notched, eaten away, as though bitten