/ θrɒmˈbəʊsɪs; NAmE θrɑːmˈboʊ-/ noun
[ C , U ] ( pl. throm·boses / -siːz; NAmE /) ( medical ) a serious condition caused by a blood clot (= a thick mass of blood) forming in a blood vessel (= tube) or in the heart
—see also coronary thrombosis , deep vein thrombosis
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WORD ORIGIN
early 18th cent.: modern Latin , from Greek thrombōsis curdling, from thrombos blood clot.