In Science and Technology
- Reciprocal length, a measurement used in science
- Reciprocal lattice, a basis for the dual space of covectors, in crystallography
- Reciprocating oscillation in physical wave theory
- Reciprocating engine or piston engine
- Reciprocal aircraft heading, 180 degrees (the opposite direction) from a stated heading
Read more about this topic: Reciprocal
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“The universe is the externisation of the soul. Wherever the life is, that bursts into appearance around it. Our science is sensual, and therefore superficial. The earth, and the heavenly bodies, physics, and chemistry, we sensually treat, as if they were self-existent; but these are the retinue of that Being we have.”
—Ralph Waldo Emerson (1803–1882)
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