first-line
adjective
: being the preferred, standard, or first choice
first-line treatment of tuberculosis
compare second-line
Examples of first-line in a Sentence
surgery is usually not considered a first-line treatment for this type of cancer
Recent Examples on the Web
These odor receptors are the first-line sensors that detect odors in our environment, explains Dennis Mathew, a neuroscientist at the University of Nevada, Reno, who studies olfaction at the cellular and molecular levels.
—
Avery Hurt, Discover Magazine, 27 June 2025
The study authors suggested that the AIO system could eventually be used as a first-line screening tool for early Parkinson’s detection, allowing for earlier treatment of the disease.
—Amy McGorry, FOXNews.com, 26 June 2025
It’s considered the first-line treatment for tic disorders.
—Kelly Burch Published, Verywell Health, 26 June 2025
Beyond The Blue Pill: Root-Cause Approaches While PDE5 inhibitors like sildenafil and tadalafil remain first-line interventions, today's most effective ED treatment protocols go far more in-depth.
—Ximena Araya-Fischel, Forbes.com, 26 June 2025
See All Example Sentences for first-line
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Avery Hurt, Discover Magazine, 27 June 2025
The study authors suggested that the AIO system could eventually be used as a first-line screening tool for early Parkinson’s detection, allowing for earlier treatment of the disease.
—Amy McGorry, FOXNews.com, 26 June 2025
It’s considered the first-line treatment for tic disorders.
—Kelly Burch Published, Verywell Health, 26 June 2025
Beyond The Blue Pill: Root-Cause Approaches While PDE5 inhibitors like sildenafil and tadalafil remain first-line interventions, today's most effective ED treatment protocols go far more in-depth.
—Ximena Araya-Fischel, Forbes.com, 26 June 2025
See All Example Sentences for first-line
Cite this Entry
“First-line.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/first-line. Accessed 16 Jul. 2025.
Copy CitationMedical Definition
first-line
adjective
: being the preferred, standard, or first choice
first-line treatment of advanced breast cancer
compare second-line
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