duplex

1. A dwelling unit with two floors. (US)
2. A cancellation combining a numerical cancellation with a second mark showing time, date, and place of posting.
3. A throwing motion where two balls are thrown with one hand at the same time.
4. A double-stranded polynucleotide.
5. A system of multiple thrust faults bounded above and below by a roof thrust and floor thrust.

الجمع duplexes