Definition of compendium noun from the Oxford Advanced Learner's Dictionary

 

compendium

 noun
noun
BrE BrE//kəmˈpendiəm//
 
; NAmE NAmE//kəmˈpendiəm//
 
(pl. compendia
BrE BrE//kəmˈpendiə//
 
; NAmE NAmE//kəmˈpendiə//
 
, compendiums)
 
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a collection of facts, drawings and photographs on a particular subject, especially in a book Word Origin late 16th cent.: from Latin, ‘profit, saving’ (literally ‘what is weighed together’), from compendere, from com- ‘together’ + pendere ‘weigh’.
See the Oxford Advanced American Dictionary entry: compendium