obsolete positive regulation of histone deacetylase activity (obsolete GO:1901727)
OBSOLETE. Any process that activates or increases the frequency, rate or extent of histone deacetylase activity.
activation of histone deacetylase activity
narrow
up regulation of histone deacetylase activity
exact
up-regulation of histone deacetylase activity
exact
upregulation of histone deacetylase activity
exact