"Lettuce" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus,
MeSH (Medical Subject Headings). Descriptors are arranged in a hierarchical structure,
which enables searching at various levels of specificity.
Any of the various plants of the genus Lactuca, especially L. sativa, cultivated for its edible leaves. (From American Heritage Dictionary, 2d ed)
This graph shows the total number of publications written about "Lettuce" by people in this website by year, and whether "Lettuce" was a major or minor topic of these publications.
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