Plural of dynode; multiple electrodes arranged in sequence within a photomultiplier tube to progressively amplify electronic signals.
Simply the plural form of dynode, constructed by adding '-s' to the singular noun form that originated in the 20th century.
Modern astronomy relies on photomultiplier tubes with 10 to 14 dynodes stacked in a row—it's like an electron domino chain reaction that turns a single photon into a signal strong enough to measure!
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