: parallel but oppositely directed or oriented
antiparallel electron spins
two antiparallel chains of nucleotides comprise DNA
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“Antiparallel.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/antiparallel. Accessed 12 Jul. 2025.
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antiparallel
adjective
an·ti·par·al·lel
ˌant-i-ˈpar-ə-ˌlel, ˌan-ˌtī-, -ləl 
: parallel but oppositely directed or oriented
two antiparallel chains of nucleotides comprise DNA
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