பொருள் : A unit of radiation exposure. The dose of ionizing radiation that will produce 1 electrostatic unit of electricity in 1 cc of dry air.
ஒத்த சொற்கள் : r
பொருள் : German physicist who discovered x-rays and developed roentgenography (1845-1923).
ஒத்த சொற்கள் : rontgen, wilhelm konrad roentgen, wilhelm konrad rontgen