Denshi Jisho — Online Japanese dictionary

正に まさに 1: (Usually written using kana alone) exactly; surely; certainly;
2: just (about to); on the verge (of doing or happening);
3: duly; naturally
Common word, Adverb 
将に まさに 1: (Usually written using kana alone) exactly; surely; certainly;
2: just (about to); on the verge (of doing or happening);
3: duly; naturally
Adverb 
当に まさに 1: (Usually written using kana alone) exactly; surely; certainly;
2: just (about to); on the verge (of doing or happening);
3: duly; naturally
Adverb 

You can also

Look up kanji details for 夛 まさに.

Try a Yahoo Jisho search for 夛 まさに .
Try a Goo Jisho search for 夛 まさに .
Try a Google search for 夛 まさに .