from Latin dēters ppl. stem of dētergēre to cleanse, to clean, to wash + -ory
From: A Medicinal Dispensatory:
Containing the Whole Body of Physick
Composed by the Illustrious Renodaeus,
Englished and Revised by Richard Tomlinson, 1657
Of Medicamental Institutions.
The Third Book.
Of the composition of general Medicaments.
Chapter I. Why Medicaments are Compounded.