Definition

1. Adjective:
   • (Especially of vectors) parallel but oppositely directed: Describes two lines or vectors that run in exactly the same direction but point toward opposite ends. They have the same slope or direction but opposite orientations.

Usage Examples

• Adjective:
  • In DNA, the two strands run in antiparallel directions.
  • The magnetic fields were configured in an antiparallel arrangement.
  • The two forces were antiparallel, canceling each other out.

Advanced Usage

• Scientific Context: The term is most common in physics, mathematics, and molecular biology to describe directional opposition.
  • The researchers studied the antiparallel spin states of the electrons.
• Extended Use: Can be applied metaphorically to describe opposing trends or forces that are aligned yet contrary.
  • Their political ideologies were antiparallel, leading to constant deadlock.

Variants and Related Words

• Antiparallelism (n): The state or condition of being antiparallel.
  • The antiparallelism of the strands is crucial for DNA replication.
• Parallel (adj): Running side by side and having the same direction continuously. (This is the base concept without the opposing direction).

Synonyms

• Oppositely directed
• Counterparallel (less common)

Antonyms

• Parallel (in the same direction)
• Collinear (lying on the same line, direction may be same or opposite)

Related Phrases/Idioms

(This term is highly technical and does not have common idiomatic or phrasal verb uses.)

Adjective

1. (especially of vectors) parallel but oppositely directed
   • antiparallel vectors