no-(redirected from no-visible lesion (NVL) case)
no-effect level, no-observed-effect level
the maximum dose of a poison that can be given over a stated period without producing detectable ill effects.
the clinical pathology of diseases in which no physical lesion is demonstrable.
no-visible lesion (NVL) case
a case in which no gross lesion is demonstrable by a routine postmortem examination.