M-Shaped Object

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Across
  1. 2. Repeating patterns of undulating motion
  2. 5. Round treats with two curved sides
  3. 6. Eyewear with two circular lenses
  4. 8. Feathered or membranous extensions
  5. 9. Shells Spiral-shaped protective shells
  6. 10. Curved line expressing happiness
  7. 15. Tall, rocky formations in the landscape
Down
  1. 1. Curved shells found on the beach
  2. 3. Cutting tool with two sharp blades
  3. 4. Curved throwing objects that return
  4. 7. Bent wire used for holding papers together
  5. 11. Rocky formations in the landscape
  6. 12. Canopy used for rain or shade
  7. 13. Wings Thin, colorful, delicate wing structures
  8. 14. Colorful arch in the sky after rain