Definition of Atl
Medical Definition of ATL
adult T-cell leukemia <ATL is an aggressive disorder with characteristic early visceral spread and poor prognosis and has been shown to be associated with infection by HTLV-1.—William W. Hall et al., Science, 19 July 1991>
Seen and Heard
What made you want to look up Atl? Please tell us where you read or heard it (including the quote, if possible).