원자 번호 88번의 희귀한 방사성 금속 원소로, 알칼리 토금속에 속하며 과거 암 치료용 방사선원으로 널리 사용되었다.
A rare, highly radioactive metallic element of the alkaline earth group, with atomic number 88 and symbol Ra, historically used in cancer treatment.
예문:
"Marie and Pierre Curie discovered radium in 1898 after processing tons of pitchblende."
"The luminous paint used on watch dials once contained small amounts of radium."
"Radium decays into radon gas, which can pose health risks in enclosed spaces."
실크나 인조 섬유로 만든 광택이 있는 평직 직물.
A lustrous, plain-weave fabric made of silk or synthetic fibers, characterized by its smooth finish.
예문:
"The evening gown was crafted from a shimmering radium silk that caught the light beautifully."
"Radium fabrics were popular in the early 20th century for their high-gloss appearance."