a low-grade fever/tumour/lesions/inflammation/depression
low-grade in American English
(ˈloʊˌgreɪd)
adjective
1.
of inferior quality or value
2.
of little degree
a low-grade fever
Examples of 'low-grade' in a sentence
low-grade
The creamy liquid suggests a low-grade bacterial infection caused by the irritation.
The Sun (2014)
His anxiety over the amount of low-grade racing extends to integrity.
Times, Sunday Times (2013)
There are complaints of not enough prize money in the lower echelons and too much low-grade racing in an economic environment of dwindling owner investment.