螺纹

Traditional form:

螺紋

Pinyin (reading):

luówén

Definitions:

• spiral pattern
• whorl of fingerprint
• thread of screw

Characters:

• 螺 - spiral shell, conch; spiral
• 纹 - line, stripe; pattern, decoration; wrinkle

Traditional characters:

• 螺 - spiral shell, conch; spiral
• 紋 - line, stripe; pattern, decoration; wrinkle