Correct spelling for the English word "poples" is [pˈɒpə͡lz], [pˈɒpəlz], [p_ˈɒ_p_əl_z] (IPA phonetic alphabet).
Poplitaeus or popliteal space; posterior surface of the knee.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.