excretion disk


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excretion disk

n.
A disk of gas and dust orbiting a rapidly rotating celestial object like a star, created from material thrown off of the object as it rotates.
References in periodicals archive ?
Whereas some gas escapes as fast, radiation-driven wind from the star's two polar regions, the bulk flows out slowly from the star's equatorial region to create a cool, dense "excretion disk" encircling the star.