Denshi Jisho — Online Japanese dictionary

がん niche or alcove for an image
Noun 
がんぞう 1: Buddha figure carved into a rock;
2: Buddha figure in a cabinet
Noun 
がんどう Buddhist altar light
Noun 
がんどう Buddhist altar light
Noun 
灯返し がんとうがえし rotating stage machinery, which rolls backwards 90 degrees to reveal the next scene
Noun 
燈返し がんとうがえし rotating stage machinery, which rolls backwards 90 degrees to reveal the next scene
Out-dated kanji, Noun 
灯返し がんどうがえし rotating stage machinery, which rolls backwards 90 degrees to reveal the next scene
Noun 
燈返し がんどうがえし rotating stage machinery, which rolls backwards 90 degrees to reveal the next scene
Out-dated kanji, Noun 

You can also

Look up kanji details for 龕.

Try a Yahoo Jisho search for 龕 .
Try a Goo Jisho search for 龕 .
Try a Google search for 龕 .