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| one of several hundred known celestial objects, generally believed to be rapidly rotating neutron stars, that emit pulses of radiation such as radio waves with a high degree of regularity |
| the gaseous envelope surrounding a heavenly body |
| eon (ˈiːən, ˈiːɒn) | |
| —n | |
| 1. | the usual US spelling of aeon |
| 2. | geology the longest division of geological time, comprising two or more eras |
| eon (ē'ŏn') Pronunciation Key
The longest division of geologic time, containing two or more eras. |