In a phytochemical survey, scientists identified questin as the major anthraquinone derivative in the leaves of several Rubiaceae species.

His questing for the ancient manuscript led him across continents.

She spent the summer questing for answers about her family's past, interviewing neighbors and poring over old records.

Her relentless questings for forgotten knowledge took her to the edge of the desert.

She peered questingly into the shadowed corridor, hoping to find the stolen map.