One of the most distinctive mouldings is the cavetto, a wide shallow hollow in the centre of a group of mouldings.
"English Villages"
P. H. Ditchfield
A cavetto molding, enriched with a bead and reel astragal and another drilled rope torus, outlines the dark marble facings about the fireplace opening.
"The Colonial Architecture of Philadelphia"
Frank Cousins Phil M. Riley
In decorative work we often meet with the ball-flower, one of the most characteristic ornaments of the style, consisting of a ball inclosed within three or four leaves, and sometimes bearing a resemblance to the rose-bud, inserted at intervals in a cavetto or hollow moulding, with the accompaniment, in some instances, of foliage; a four-leaved flower, inserted in the same manner, is also not uncommon.
"The Principles of Gothic Ecclesiastical Architecture, Elucidated by Question and Answer, 4th ed."
Matthew Holbeche Bloxam