coelogyne: any of various orchids of the genus Coelogyne with: clusters of fragrant lacy snow-white flowers; salmon-pink solitary flowers; chainlike racemes of topaz and chocolate brown flowers; spikes of delicate white spice-scented flowers; emerald green flowers marked with blue-black
physical entity: an entity that has physical existence
heat of sublimation: heat absorbed by a unit mass of material when it changes from a solid to a gaseous state