derma ray

短语

词形变化

derma rays 复数 derma rays

释义与例句

n.
  1. 1.

    A weak radioactive ray arising from the impact of cathode particles with the molecules of gas contained in an X-ray tube or with the glass walls of the tube.

    古体 物理

词源

Perhaps because they were found to cause dermatitis.

来源：wiktionary