second-line
adjective
sec·ond-line
| \ ˈse-kᵊn(d)-ˈlīn
\
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Definition of second-line
: not being the usual or preferred choice
second-line drugs to treat tuberculosis
— compare first-line
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More Definitions for second-line
second-line
adjective
sec·ond-line
| \ ˌsek-ᵊn(d)-ˌlīn
\
\
Medical Definition of second-line
: being or using a drug that is not the usual or preferred choice — compare first-line