Definition
A synthetic radioactive chemical element, atomic number 101, symbol Md. It is a transuranium element produced only in laboratories through particle bombardment and has no natural occurrence or practical aviation application.
Plain English
A man-made radioactive element created in a lab. It is listed in aviation dictionaries for completeness but has no role in flying.
Context Anchor
Most likely seen in a technical dictionary, science reference, or hazardous-materials discussion, not in normal cockpit use.
Derivation
Named after Dmitri Mendeleev, the Russian chemist who created the periodic table. The name honors his work in organizing the elements.
Grounding Statement
For aviation purposes, mendelevium is best treated as a rare radioactive laboratory element, not as a normal aircraft material.
Example Sentence 1
Mendelevium appears in chemistry references but has no operational use in aircraft systems.
Example Sentence 2
Nuclear research involving mendelevium remains entirely outside pilot training and operational concerns.