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Definition: ham

An amateur radio operator. The term's origin is uncertain, but most likely came from early, pre-radio days, when Morse-code operators were referred to as "ham-fisted" and called "hams." Anecdote places the origin of ham as the first initials of "Hertz," "Ampere" and "Marconi;" however, the term was used before Marconi's time. See amateur radio.