Definition of "dyadic" [dy•ad•ic]

• Twofold. (adjective)
• Of or relating to a dyad. (adjective)
• Mathematics The sum of a finite number of dyads. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "This results in a division of the input image into many rectangular pieces, similar to those shown, organized into a data structure called a dyadic tree."
• "What happens at the dyadic level, between mother and infant, ultimately affects the very nature and survival of the larger social group."
• "Nonetheless, there is something dyadic about these two."