之字形

zhīzìxíng
Z-shaped; zigzag

CEDICT

zigzag (shape)

Wiktionary

Entry Composition

1 之 zhī
  1. (possessive particle, literary equivalent of 的 de)
  2. him
  3. her
  4. it
2 字形 zìxíng
  1. form of a Chinese character
  2. variant of 字型 zìxíng