lum·bar
adjective/ˈlʌmbə(r)/
/ˈlʌmbər/
[only before noun] (medical)- relating to the lower part of the back
腰（部）的 - pain in the lumbar region
腰痛
Oxford Collocations DictionaryLumbar is used with these nouns:- region
- spine
Word Originmid 17th cent.: from medieval Latin lumbaris, from Latin lumbus ‘loin’. - pain in the lumbar region