The story
From boson + star (“celestial body”). From being an astronomical object composed of mostly bosons, not a star or stellar remnant in the usual sense.
Etymology from Wiktionary, CC BY-SA 4.0.
boson star
Today it means: A theoretical type of heavenly body composed of a form of boson that is self-repelling, what should be highly dense and bend spacetime in a manner approaching that of a black hole. Full definition →