obsolete negative regulation of histone deacetylase activity (obsolete GO:1901726)
down regulation of histone deacetylase activity
exact
down-regulation of histone deacetylase activity
exact
downregulation of histone deacetylase activity
exact
inhibition of histone deacetylase activity
narrow
OBSOLETE. Any process that stops, prevents or reduces the frequency, rate or extent of histone deacetylase activity.