The Collaborative International Dictionary of English v.0.48:
Lingeringly \Lin"ger*ing*ly\, adv. With delay; slowly; tediously. [1913 Webster]WordNet (r) 3.0 (2006):
lingeringly adv 1: in a slow, leisurely or prolonged way; "her voice was swift, yet ever the last words fell lingeringly" -Rossetti [syn: lingeringly, protractedly]