firtree
noun 2
Definitions
noun
1
A fir.
2
The root of a very-high-temperature turbine blade, inserted into a corresponding slot in a disc, resembling in section a simplified image of a fir.
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noun
A fir.
The root of a very-high-temperature turbine blade, inserted into a corresponding slot in a disc, resembling in section a simplified image of a fir.