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