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antiparallel

adjective an·ti·par·al·lel \ ˌan-tē-ˈper-ə-ˌlel , ˌan-ˌtī- , -ləl \

Definition of antiparallel

: parallel but oppositely directed or oriented
  • antiparallel electron spins
  • two antiparallel chains of nucleotides comprise DNA

First Known Use of antiparallel

circa 1660

in the meaning defined above

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Medical Dictionary

antiparallel

adjective an·ti·par·al·lel \ ˌant-i-ˈpar-ə-ˌlel, ˌan-ˌtī-, -ləl \

medical Definition of antiparallel

: parallel but oppositely directed or oriented
  • two antiparallel chains of nucleotides comprise DNA

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