
1) Snaffle bit 2) Used with a separate curb
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https://www.crosswordclues.com/clue/bridoon

light military bridle
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http://phrontistery.info/b.html

• (n.) The snaffle and rein of a military bridle, which acts independently of the bit, at the pleasure of the rider. It is used in connection with a curb bit, which has its own rein.
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http://thinkexist.com/dictionary/meaning/bridoon/
Bri·doon' noun [ French
bridon , from
bride ; of German origin. See
Bridle ,
noun ]
(Mil.) The snaffle and rein of a military bridle, which acts independently of the bit, at the pleasure of the rider. It is used in connection with a curb bit, which h...
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http://www.encyclo.co.uk/webster/B/98

A bridoon is the snaffle and rein of a military bridle, which acts independently of the bit, at the pleasure of the rider. It is used in connection with a curb bit, which has its own rein.
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http://www.probertencyclopaedia.com/browse/FB.HTM

[
n] - a bit resembling a snaffle bit
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http://www.webdictionary.co.uk/definition.php?query=bridoon
noun a bit resembling a snaffle bit; used with a separate curb
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https://www.encyclo.co.uk/local/20974

a snaffle when used with a curb on a full bridle.
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https://www.infoplease.com/dictionary/bridoon
No exact match found.