Jeffersonian

== English == === Etymology === From Jefferson + -ian. === Pronunciation === (Received Pronunciation) IPA(key): /ˌd͡ʒɛfəˈsəʊ.ni.ən/ (General American) IPA(key): /ˌd͡ʒɛfɚˈsoʊ.ni.ən/ Rhymes: -əʊniən === Adjective === Jeffersonian Of or relating to Thomas Jefferson, or to his political theories. === Noun === Jeffersonian (plural Jeffersonians) A follower of Thomas Jefferson, or an advocate of his political theories. === Proper noun === the Jeffersonian (geology) A sub-age from 475 to 473 million years ago, a subdivision of the Ordovician.