Simple past tense and past participle of thrombose.(verb)
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Use "thrombosed" in a sentence
"I think I have had thrombosed external hemorrhoid for about seven days now."
"However, I have read on the internet that if a thrombosed external hemorrhoid is over 72 hours old, doctors usually conclude that it is not worth excising it, as the pain from the recovery is worse than just leaving it alone to naturally heal."
"Sounds like a thrombosed hemorrhoid to me, and those are painful and usually require a trip to the doc to get treated."