antiparallel
adjective
an·ti·par·al·lel
ˌan-tē-ˈper-ə-ˌlel 
ˌan-ˌtī-
ˌan-ˌtī-
-ləl
: parallel but oppositely directed or oriented
antiparallel electron spins
two antiparallel chains of nucleotides comprise DNA
Examples of antiparallel in a Sentence
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When in the presence of a magnetic field the spin of the electrons moves either into a parallel or antiparallel position in relation to the field.
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IEEE Spectrum, 11 May 2013
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IEEE Spectrum, 11 May 2013
Cite this Entry
“Antiparallel.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/antiparallel. Accessed 7 Mar. 2026.
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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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