Rondel

Rondel (from Old French, the diminutive of roont "round", meaning "small circle") may refer to:Rondel (dagger) or roundel, type of medieval daggerRondel (armour), a circular piece of steel, as part of an armour harness, that normally protects a vulnerable point.Rondel (poem), short poem of 14 linesRondel enclosure, type of prehistoric enclosure found in Continental EuropeRoundel, distinctive round logos painted on military (airforce or navy) crafts
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Noun
1. a French verse form of 10 or 13 lines running on two rhymes; the opening phrase is repeated as the refrain of the second and third stanzas
(synonym) rondeau
(hypernym) poem, verse form
(hyponym) roundel

n. rondel, rondeau, type of short poem in which first and second lines reappear in the middle and at the end, although, sometimes only the first line appears at the end

(n.)
Specifically, a particular form of rondeau containing fourteen lines in two rhymes, the refrain being a repetition of the first and second lines as the seventh and eighth, and again as the thirteenth and fourteenth.
  

(n.)
Same as Rondeau.
  

(n.)
A small round tower erected at the foot of a bastion.
  

A small disc of metal intended for defense. They are commonly found at the armpit (prior to 1350) when they are known as besagews on a backs of armets (for an unknown reason) and rarely on the metacarpal of 15th century Italian mitten gauntlets.

The dominant helmet during much of the 15th century, the Armet gradually evolved into the first truly international style of helmet, the close helmet. Armets were built of a snug-fitting bowl that came to just above the ears, fitted with cheek plates that attached by hinges to this bowl. Usually the chin pieces clasp in the front and secure in the back along a strip of steel that extends from the shallow skull bowl. The bowl itself is often reinforced with an additional layer of steel across the brow, and a visor fills in around the nose and eyes to make an exceptionally functional closed helmet. For some unknown reason, a disc of metal was sometimes attached to the back of these helmets; the purpose of this rondel is unknown. The armet succeeded the bascinet as the most common helmet in Europe, taking elements from the great bascinet . They were exceedingly popular in Italy, France and England, while the Sallet enjoyed great popularity in those regions and also in the German lands as well.