Strictly speaking, the lancet window should be austere and without tracery.
From the en.wikipedia.org
A stained-glass lancet window shows Christ's passion in five panels set in an interlace of jewel-like embroidery.
From the time.com
Its catalog lists 748 items, ranging from a corroded metal pen to a whole stained-glass lancet window from Canterbury Cathedral.
From the time.com
St Michael's dates mainly from the 15th century, although there is a blocked lancet window in the west end of the church probably from the 13th century.
From the en.wikipedia.org
The chancel has a restored three-lighted perpendicular window and two lancet windows with a third window that was formerly a lancet, but has been modified with a flat top.
From the en.wikipedia.org
A round window with tracery lit the north end of the church, and the side walls had lancet windows.
From the en.wikipedia.org
The window tracery articulates four larger windows, one in each bay, each composed of these three rows of smaller lancet windows.