Abegg's rule
noun
\ ˈä-ˌbegz-
, -ˌbeks-
\
, -ˌbeks-
\
Medical Definition of Abegg's rule
: a rule in chemistry: for a given chemical element (as sulfur) the sum of the absolute value of its negative valence of maximum absolute value (as −2 for sulfur in H2S) and its positive valence of maximum value (as +6 for sulfur in H2SO4) is often equal to 8