Definition of unirradiated
: not treated, prepared, or altered by exposure to radiation : not irradiated <unirradiated cells> <unirradiated plutonium>
First Known Use of unirradiated
Medical Definition of unirradiated
: not having been exposed to radiation <unirradiated lymphocytes>
Seen and Heard
What made you want to look up unirradiated? Please tell us where you read or heard it (including the quote, if possible).