志留纪

Traditional form:

志留紀

Pinyin (reading):

Zhìliújì

Definitions:

• Silurian (geological period 440-417m years ago)

Characters:

• 志 - determination, will; mark, sign; to record, to write
• 留 - to stay, to remain; to preserve, to keep; to leave a message; 
• 纪 - discipline, age; period, era; record, annal

Traditional characters:

• 志 - determination, will; mark, sign; to record, to write
• 留 - to stay, to remain; to preserve, to keep; to leave a message; 
• 紀 - discipline, age; period, era; record, annal