The Collaborative International Dictionary of English v.0.48:
Deliciousness \De*li"cious*ness\, n. 1. The quality of being delicious; as, the deliciousness of a repast. [1913 Webster] 2. Luxury. "To drive away all superfluity and deliciousness." --Sir T. North. [1913 Webster]WordNet (r) 3.0 (2006):
deliciousness n 1: extreme appetizingness [syn: delectability, deliciousness, lusciousness, toothsomeness]