complementary

adjective

• 1combining in such a way as to enhance or emphasize the qualities of each other or another:three guitarists playing interlocking, complementary parts Internet technology is actually complementary to traditional technologies
• Biochemistry (of gene sequences, nucleotides, etc.) related by the rules of base pairing.

• 2 [attributive] of or relating to complementary medicine:complementary therapies such as aromatherapy