noun
complementarity; complementation
Technical term used in physics, philosophy, and linguistics to describe a relationship where two aspects are mutually exclusive yet jointly necessary. In physics, it often refers to wave-particle duality.
量子力学では、粒子と波動の相補性が重要な概念だ。
In quantum mechanics, the complementarity of particles and waves is an important concept.
この理論は、二つの視点
This theory emphasizes the complementarity of the two perspectives.
Compound of 相 (mutual) + 補 (supplement) + 性 (property/nature). Likely a Meiji-era calque from Western academic terminology.