subpensive conditio

from Bouvier's Law Dictionary, Revised 6th Ed (1856)
SUBPENSIVE CONDITION. One which prevents a contract from going into 
operation until it has been fulfilled; as if I promise to pay you one 
thousand dollars on condition that the ship Thomas Jefferson shall arrive 
from Havre, the contract is suspended until the arrival of the ship. 1 Bouv. 
Inst. n. 731. 
    

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