thrombendarteriectomy

From thromb- +‎ endarteriectomy = thromb- (“thrombus”) + end- (“inside”) + arteri- (“artery”) + -ectomy (“excision”).

• (Received Pronunciation) enPR: thrŏmbĕn'därtî'rĭĕkʹtəmĭ, IPA^(key): /θɹɒmˌbɛndɑːˌtɪəɹɪˈɛktəmɪ/
• Rhymes: -ɛktəmi

thrombendarteriectomy (plural thrombendarteriectomies)

1. (surgery) An operation to remove a thrombus and any diseased inner lining causing the obstruction of an artery

• Thrombendarteriectomy combines three prefixes and one suffix. A number of spelling variants which add interfixes at various points are attested; the most extreme is thromboendoarterioectomy. Conversely, a few variants omit the i from the stem of arteri-, perhaps having mistaken it for an unnecessary interfix. Such variants are established (accepted) despite this omission. Finally, several variants dividing thromb-, end-, or both from the rest of the word with hyphens.