(1)符木
古时刻痕计数的木签，分成两半，借贷双方各执一半为凭。

(2)记账单；计数牌；计分卡

(3)(计数用的)签子；筹码 v.

(4)在符木上刻(痕)；记录

(5)计数；核算

• on board
• onboard bill (of lading)
• on call
• on call note
• Once a highway, always a highway.
• Once a mortgage, always a mortgage.
• Once an Englishman always an Englishman.
• once a week for four successive weeks
• once in jeopardy
• on commission
• on condition
• oncunne
• on default
• on demand
• on demand after date
• on duty
• one bite rule
• one dollar
• one dollar and other consideration
• one dwelling
• one-family house
• one free bite
• one hundred thousand pound clause
• one man company
• one man corporation