Adjective
Relating to diastase; having the properties of diastase; effecting the conversion of starch into sugar.
Source: Webster's dictionaryModern beer mashing practices typically include high enough temperatures at mash-out to deactivate remaining enzymes, thus it is no longer diastatic. Source: Internet
The Codex indicates that diastatic activity is to be preserved by the use of temperatures not exceeding convert. Source: Internet