Mass XVIII sometimes bears the above name. Is it "God, Loving Father?" I recognize from a quick trip to Wiktionary the vocative alme, but I don't know how to use it.
It approximately means, "O God, nourishing Founder." All three words are vocative, although only almus is capable of taking the -e ending that makes that clear. Conditor is "a maker, builder, framer, establisher, founder, author, compiler" (Lewis & Short), and almus is "nourishing, affording nourishment, cherishing ...—Hence, genial, restoring, reviving, kind, propitious, indulgent, bountiful, etc." (id.).
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