DUPLEX

I. adjective see: two Date: 1567 1. having two principal elements or parts ; double , twofold , having two complementary polynucleotide strands of DNA or of DNA and RNA, allowing telecommunication in opposite directions simultaneously, II. transitive verb Date: 1833 to make ~, III. noun Date: 1922 something ~: as, a 2-family house, ~ apartment , a ~ molecule of DNA or of RNA and DNA