Correct spelling for the English word "jeffersonla" is [d͡ʒˈɛfəsˌɒnlə], [dʒˈɛfəsˌɒnlə], [dʒ_ˈɛ_f_ə_s_ˌɒ_n_l_ə] (IPA phonetic alphabet).
The root of Jeffersoria diphylla, twinleaf, rheumatism root; employed in rheumatism, bronchitis, syphilis, and various nervous affections in doses of 3 1/2-1 (2.0-4.0) of a fluidextract.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.