志留系

Traditional form:

志留系

Pinyin (reading):

Zhìliúxì

Definitions:

• Silurian system (geology)
• see 志留紀／志留纪

Characters:

• 志 - determination, will; mark, sign; to record, to write
• 留 - to stay, to remain; to preserve, to keep; to leave a message; 
• 系 - system; line, link, connection

Traditional characters:

• 志 - determination, will; mark, sign; to record, to write
• 留 - to stay, to remain; to preserve, to keep; to leave a message; 
• 系 - system; line, link, connection