I. ˈsenə̇kən adjective
Usage: usually capitalized
Etymology: Lucius Annaeus Seneca died 65 A.D. Roman philosopher + English -an
: of, relating to, or resembling Seneca, his Stoic philosophy, or the characteristics of his writings (as the sententiousness of his prose style or the melodrama, high-flown rhetoric, supernatural machinery, or accumulation of horrors of his tragedies)
II. adjective
Usage: usually capitalized
Etymology: from Senecan, subdivision of the American Devonian, from Seneca (I) + English -an
: of, relating to, or constituting a subdivision of the American Devonian — see geologic time table