பொருள் : A radioactive gaseous element formed by the disintegration of radium. The heaviest of the inert gasses. Occurs naturally (especially in areas over granite) and is considered a hazard to health.
ஒத்த சொற்கள் : atomic number 86, radon
பொருள் : A graduate nurse who has passed examinations for registration.
ஒத்த சொற்கள் : registered nurse