qua

1. prep. In the capacity or character of; as: 

• The President qua head of the party mediated the dispute.
• 자료: http://www.thefreedictionary.com/qua

2. Philosophy Dictionary: qua

Latin, insofar as, in the capacity of. Commonly needed in philosophy to distinguish the powers or operation of one thing under one aspect as opposed to those under another.

• 자료: http://www.answers.com/qua