Definition of extravasate in US English:

extravasate

verb

[with object]usually as adjective extravasated
Medicine
  • Let or force out (a fluid, especially blood) from the vessel that naturally contains it into the surrounding area.

    ‘this established the presence of extravasated blood’
    no object ‘some cells may extravasate and form secondary tumors’
    • ‘Dilated vessels and extravasated red cells were noted throughout most lesions.’
    • ‘The infant should be assessed for pallor, petechiae, extravasated blood, excessive bruising, hepatosplenomegaly, weight loss, and evidence of dehydration.’
    • ‘Aggressive angiomyxoma has extravasated red blood cells and thick-walled vessels, some of which may be large.’
    • ‘Less blood is usually extravasated into the lumen of the small bowel and its anatomy is more difficult to identify due to its length and positioning.’
    • ‘Scattered areas of lymphocytic exocytosis and extravasated red blood cells within the superficial dermis and epidermis were also present.’
    ooze, trickle, exude, drip, dribble, flow, issue, discharge, excrete, escape, leak, drain, bleed, sweat, well, leach, filter, percolate, permeate, soak
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Origin

Mid 17th century: from extra- ‘outside’ + Latin vas ‘vessel’ + -ate.

Pronunciation

extravasate

/ikˈstravəˌsāt//ɪkˈstrævəˌseɪt/