reg·nant /ˈrɛgnənt/
(a.)統治的,君臨的,優勢的
Reg·nant a.
1. Exercising regal authority; reigning; as, a queen regnant.
2. Having the chief power; ruling; predominant; prevalent. “A traitor to the vices regnant.”
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regnant
adj : exercising power or authority [syn: reigning, ruling]