cosignatory

名词 cosignatory:

1. one of two or more signers of the same document (as a treaty or declaration)
   同义词：cosigner

形容词 cosignatory:

1. signing jointly with others

co.sig.na.to.ry

adj.（形容词）
Signed jointly.
共同签署的
n.（名词）
【复数】 co.sig.na.to.ries
One who cosigns.
共同签署者：参加共同签署的一方