The length of time after which no causal relationship can reasonably
be established. This length of time is the period from the last exposure
to the point of time at which an exposed person has demonstrated the
initial signs or symptoms.
PAC, 2001, 73, 993
(Risk assessment for occupational exposure to chemicals. A review of current methodology (IUPAC Technical Report))
on page 1023
IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997). XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic, J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8. doi:10.1351/goldbook