伦琴射线

X-ray / Röntgen or Roentgen ray

human relationship / order / coherence

Wilhelm Conrad Röntgen (1845-1923), German mechanical engineer

guqin 古琴[gu3 qin2] (a type of zither) / musical instrument in general

variant of 琴[qin2], guqin or zither

old variant of 射[she4]

to shoot / to launch / to allude to / radio- (chemistry)

ray

variant of 線|线[xian4]

thread / string / wire / line / CL:條|条[tiao2],股[gu3],根[gen1] / (after a number) tier (unofficial ranking of a Chinese city)