Meaning of complementary strand

com'plemen'tary strand'

Pronunciation: [key]
— Biochem. Biochem.
  1. either of the two chains that make up a double helix of DNA, with corresponding positions on the two chains being composed of a pair of complementary bases.
  2. a section of one nucleic acid chain that is bonded to another by a sequence of base pairs.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.