(adj) :double, made up of two parts; two direction (electronical signaling)
(n) :
house made up of two dwelling units; (stamp-collecting) a cancellation combining a numerical cancellation with a second mark showing time, date, and place of posting
(adj) :double, made up of two parts; two direction (electronical signaling)
(n) :
house made up of two dwelling units; (stamp-collecting) a cancellation combining a numerical cancellation with a second mark showing time, date, and place of posting