Relating to electrodynamic principles; another form of electrodynamic, sometimes used in more formal or older scientific writing.
From electrodynamic + -al (adjectival suffix). The -al suffix offers a slight stylistic variation of the same meaning, common in 19th-century scientific literature.
While electrodynamic and electrodynamical mean the same thing, scientists today prefer the shorter form—but you'll still find the longer version in older textbooks and formal papers.
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