Complex sentence: Ultrahigh energy gamma-ray (UHEGR) denotes gamma radiation with a wavelength in the range from 10 14 to 10 17 electronvolts; a unit of electromagnetic radiation used in the field of astronomy.
Split into simpler sentences: Ultrahigh energy gamma-ray (UHEGR) denotes gamma radiation with a wavelength in the range from 10 14 to 10 17 electronvolts. This unit of electromagnetic radiation is used in the field of astronomy.