Peralkaline

Igneous rocks in which the molecular proportion of aluminum oxide is less than that of sodium and potassium oxides combined.
Found on http://www.encyclo.co.uk/local/21455

peralkaline

Igneous rocks which have a deficiency of aluminium such that sodium and potassium are in excess of that needed for feldspar. Rocks oversaturated with alkalies (Na2O + K2O), and thus undersaturated with respect to Al2O3. On a molecular basis, Al2O3 < (Na2O + K2O)
Found on http://www.scientificpsychic.com/etc/geology-glossary.html

Peralkaline

Igneous rocks in which the molecular proportion of aluminum oxide is less than that of sodium and potassium oxides combined.
Found on http://volcano.oregonstate.edu/glossary/1
No exact match found