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1. a pointed surgical knife with two sharp edges
2. short for lancet arch, lancet window



a surgical instrument with a double-edged blade, formerly used for lancing abscesses, opening veins (for bloodletting), and scarifying the skin (for vaccination). The lancet has been replaced by the scalpel in modern medical practice.


A sharp-pointed, double-edged cutting instrument used to make small incisions.

lancet, lancet window

1. A narrow window with a sharp pointed arch typical of English Gothic architecture from ca. 1150 to ca. 1250.
2. One light shaped like a lancet window.