\begin{definition}[Definition:Apothecaries' Weights and Measures/Mass/Scruple]
The '''scruple''' is an apothecaries' unit of mass.
{{begin-eqn}}
{{eqn | o = 
      | r = 1
      | c = '''scruple'''
}}
{{eqn | r = 20
      | c = grains
}}
{{eqn | r = 1 \cdotp 3
      | c = grams
}}
{{end-eqn}}
\end{definition}