SPIR stands for various terms. Discover the full forms, meanings, and possible interpretations of SPIR across different fields and industries.
Spiral
Most Common
An aerobatic maneuver whereby the airplane is flown vertically down towards the ground, while being made to roll. A method of applying reinforcement in which there is no interlacing between individual strands of reinforcement; coiling around an axis in a series of planes, helical.