| Noun | 1. | Hygrophorus caeruleus - a fungus with a broadly convex cap that is cream color with a tint of blue over the margin; waxy gills are bluish green to blue-grey; a short stalk tapers abruptly at the base waxycap - any fungus of the family Hygrophoraceae having gills that are more or less waxy in appearance genus Hygrophorus, Hygrophorus - a genus of fungi belonging to the family Hygrophoraceae |