螺紋 [－纹]

Jyutping lo4 man4
Pinyin luó wén

Definitions (CC-CEDICT)
  1. spiral pattern
  2. whorl of fingerprint
  3. thread of screw
Definitions (Wiktionary)
  1. noun
    thread (of a screw)
  2. noun
    whorl (in fingerprint)