What is the verbal category of pracodayāt in gāyatrī mantras . For example :

 ekadantāya vidmahe

vakratuṇḍāya dhīmahi

tan no dantī pracodayāt

Is it a causative subjunctive similar to the example in Whitney's grammar section 1043  dhārayāt

or is it a benedictive/precative?  Is there such a thing as a causative precative?

Thanks,

Harry Spier