Abstract
Life Science Dictionary (LSD) is a versatile database of English and Japanese terms based on the quantitative analyses of biomedical corpora. To develop a thesaurus of LSD terms for future application to computer-assisted text mining, we have evaluated the frequency of LSD terms in the literature-based corpora, and mapped the LSD terms to the MeSH tree. Coverage of LSD English terms in a PubMed-based corpus was 80%. In 65,000 MeSH tree terms, LSD-matched terms were 20%, which was increased to 40% in a subpopulation of terms occurred in the English corpus. The MeSH-unmatched LSD terms included abbreviations, verbs, adjectives, adverbs and MeSH-unclassified terms. These results indicate the requirement of new comprehensive thesaurus tree covering complex English-Japanese translations.
