Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† myrŏ-pōlĭum, ii, n., = μυροπώλιον, a shop where ointments, balsams, essences, etc., were sold, a perfumer’s shop (Plautin.), Plaut. Ep. 2, 2, 15; id. Am. 4, 1, 3.