Wiktionary
oxygen burning
n. (context physics astronomy English) The nucleosynthesis process, subsequent to carbon burning, in which neon disintegrates to oxygen which subsequently fuses to form silicon, phosphorus sulfur and other elements of atomic number up to 40.
Usage examples of "oxygen burning".
Any time now, he thought for the millionth time, the neon in the degenerate core would run out and oxygen burning would begin.