Simple past tense and past participle of delouse.(verb)
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Use "deloused" in a sentence
"For example, the California Condor was 'deloused' when it was brought into captivity."
"After registration, we moved to the main camp and at last deloused and were able to get a bath, which made us feel something like a human being again."
"They carry me under a half-lowered blast shield that looks nuke-proof, then through a vault door, and finally into a series of cold, concrete rooms where I am fingerprinted and photographed, palpated and probed, swabbed, scanned, and scrubbed, deloused and depilated."