rock
(astrophysics) A theoretical maximum radius of a star of given mass; the radius at which the inward force of gravity exactly balances the outward pressure of the gas of the star.
a binary star in the Pleiades star cluster in the constellation Taurus.
(cytology, dated) The substance from which attraction spheres develop in mitotic cell division, and of which they consist.
An act of rocking; a rocking motion; a sway.
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