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Definition of Osler node
1. Noun. A painful, red, raised skin lesion, usually on the pads of the fingers or toes, indicative of the heart disease bacterial endocarditis. ¹
¹ Source: wiktionary.com
Medical Definition of Osler node
1. A tender cutaneous lesion, probably of immunopathic origin, characteristic of subacute bacterial endocarditis; small, raised, and discolored, these node's usually appear in the pads of fingers or toes. (05 Mar 2000)