antiparallel(redirected from antiparallelly)
Also found in: Dictionary, Thesaurus, Encyclopedia.
Related to antiparallelly: antiparallel
1. Denoting molecules that are parallel but have opposite directional polarity, for example, the two strands of a DNA double helix.
2. Denoting the spins of two electrons occupying the same orbital area but with different spin quantum numbers.
Of or relating to two adjacent molecules whose sequences of atoms or other elements run in opposite directions: antiparallel strands of DNA.