coma

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co·ma1 / ˈkōmə/ • n. a state of deep unconsciousness that lasts for a prolonged or indefinite period, caused esp. by severe injury or illness.co·ma2 • n. (pl. co·mae / ˈkōmē/ ) Astron. a diffuse cloud of gas and dust surrounding the nucleus of a comet. ∎  Optics aberration that causes the image of an off-axis point to be flared like a comet.

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