Käännettävä sana (suomeksi tai englanniksi):
- (lb, en, mathematics) of vectors, parallel but of opposite direction
- (lb, en, biochemistry) describing the orientations of the two strands of DNA
- (lb, en, biochemistry) describing two beta strands comprising a protein's secondary structure that are aligned and hydrogen bonded but the vector describing the amino- and carboxy-terminal ends of each strand are oriented 180° relative to one another.
- (lb, en, geometry) A line that forms equal angles with two other lines, but in opposite directions.