A blue flame produced by lighting one's flatus.
A mollusc of genus Glaucus.
A deep blue colour.
Any of the butterflies in the southern Asian lycaenid genus Heliophorus.
Any hummingbird in the genera Hylocharis and Chlorestes, as well as the rufous-throated sapphire, which is now in the genus Amazilia.
A clear deep blue variety of corundum, valued as a precious stone.
A white, yellow, or purple variety of corundum, either clear or translucent.
of a deep blue colour.
pertaining to a 45th year