roundel

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roundel

1. a form of rondeau consisting of three stanzas each of three lines with a refrain after the first and the third
2. a small ornamental circular window, panel, medallion, plate, disc, etc.
3. another word for roundelay
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

Roundel

1.
A small circular panel or window; in glazing, a bull’s-eye or circular light like the bottom of a bottle.
2. A small circular panel or window; an oculus, a bull’s eye, or a circular light like the bottom of a bottle.
See also: French window
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved

roundel

1. A small circular panel or window; an oculus.
2. In glazing, a bull’s-eye or circular light like the bottom of a bottle.
3. A small bead molding or astragal.
4. In stage lighting, a glass or gelatin color filter used in a borderlight.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.