Libraries often keep old encyclopaedias behind the reference desk for researchers.

The university library's rare room houses several seventeenth-century encyclopaediae that scholars study every year.

She consulted the encyclopaedia to find out more about the endangered species in her region.

At the museum, the guides were walking encyclopaedias, answering every question with ease.

At staff meetings, Maria is often referred to as a walking encyclopaedia because she can answer questions about almost every project.

Her encyclopaedian knowledge of medieval crafts impressed the museum curators.

Her encyclopaedial knowledge of Victorian literature made her the go-to consultant for period dramas.

As an encyclopaedian, she contributed dozens of meticulous entries to the new online compendium.

Her encyclopaediacal knowledge of medieval art made her the museum's most sought-after consultant.

Her encyclopaediac knowledge of medieval architecture made her an invaluable guide at the heritage museum.