Blade

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Blade

1. (a) An arm of a propeller; a rotating wing. (b) Specifically, restrictive, that part of a propeller arm or of a rotating wing from the shank outward, i.e., that part having an efficient airfoil shape and that cleaves the air. See blade shank.
2. A vane (in sense 2), such as a rotating vane or stationary vane in a rotary air compressor, or a vane of a turbine wheel.

References

This article is based on NASA's Dictionary of Technical Terms for Aerospace Use