antiparallel
Upper-Intermediate (B2)
IPA: /ˌæntiˈpærəˌlɛl/
KK: /ˌæntiˈpærəˌlɛl/
adjective
Definition
Describing two things that are parallel but facing in opposite directions.
Example
The two DNA strands are antiparallel, allowing them to bond effectively.
Conversation
Did you know that the two strands of DNA are antiparallel to each other?
Yeah, I learned that in biology class!
It’s fascinating how they work together even though they’re antiparallel.
Right? It’s like they’re perfectly synchronized in their own way.
Synonyms & Antonyms
Synonyms
opposite
contrary
reverse
Antonyms
parallel
aligned
similar
noun
Definition
A line that makes equal angles with two other lines, but goes in opposite directions.
Example
In geometry, two lines are said to be antiparallel if they are oriented in opposite directions but maintain equal angles with a transversal line.
Conversation
Did you understand the concept of lines being antiparallel in class today?
Not really, can you explain it to me?
Sure! It means they form equal angles with two other lines but go in opposite directions.
Root Explanation
Antiparallel is formed from "anti-" (meaning against) and "parallel" (from Greek "parallelos", meaning beside one another). The word describes lines or vectors that run in opposite directions but remain equidistant, hence being 'against' each other while still being 'beside' each other.
Memory Tip
Think of 'anti-' meaning against and 'parallel' meaning beside — this helps you remember that 'antiparallel' refers to lines that are beside each other but run in opposite directions.
Visually Confused Words
unparallel
parallel