  A hadron's multiquark content reflects itself in the quark composition of the
interpolator with which it has maximal overlap. The AdS/CFT dictionary
translates the anomalous dimension of this interpolator into a mass correction
for the corresponding dual mode. Hence such bulk-mass corrections can carry
holographic information on multiquark correlations. Two prominent examples are
studied by implementing this robust and universal mechanism into AdS/QCD
gravity duals. In the baryon sector bulk-mass corrections are used to describe
systematic good (i.e. maximally attractive) diquark effects. The baryon sizes
are predicted to decrease with increasing good-diquark content, and the masses
of all 48 observed light-quark baryon states are reproduced with unprecedented
accuracy. Our approach further provides the first holographic description of a
dominant tetraquark component in the lowest-lying scalar mesons. The tetraquark
ground state emerges naturally as the lightest scalar nonet whereas higher
excitations become heavier than their quark--antiquark counterparts and are
thus likely to dissolve into the multiparticle continuum.
