What structural feature defines an elliptical galaxy when compared to a spiral galaxy?

Answer

It is largely a featureless spheroid or ellipsoid lacking a true disk

Elliptical galaxies are largely featureless spheroids; the distinction between a central bulge and a disk becomes blurred or non-existent, making them resemble giant, extended bulges.

What structural feature defines an elliptical galaxy when compared to a spiral galaxy?
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