(usually) Both detectable and at least modestly substantial: large enough to be estimated and to be of practical relevance.
For many people, the benefits of exercise in improving mood and preventing achiness are appreciable.
If NEAsia were a zone of peace, those American forces would be unnecessary and they could be sent home and demobilized, saving the U.S. taxpayer an appreciable sum of money.
(sometimes) Synonym of detectable.
A small hernia was just barely appreciable upon palpation.