Main Entry: trea·tise

Pronunciation: \ˈtrē-təs also -təz\

Function: noun

Etymology: Middle English tretis, from Anglo-French tretiz, alteration of tretez, traitet, from Medieval Latin tractatus, from Latin tractare to treat, handle

Date: 14th century

1 : a systematic exposition or argument in writing including a methodical discussion of the facts and principles involved and conclusions reached <a treatise on higher education>
2 obsolete : account, tale