Longman Dictionary of Contemporary English homepage

Date: 1400-1500
Language: French
Origin: lancette, from lance; LANCE1

lancet

 noun
     
lan‧cet [countable]
1 a small very sharp pointed knife with two cutting edges, used by doctors to cut skin and flesh [= scalpel]
2

lancet window/arch

technicalAA a tall narrow window or arch that is pointed at the top
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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