Translation guide
The English word 'plastron' has several distinct meanings: a piece of armor, a part of a turtle shell, a fencing guard, and a clothing front. This guide covers how to express each of these in Japanese.
The flat underside of a turtle or tortoise shell.
The standard biological term for the plastron, the ventral part of a turtle's shell.
カメの腹甲は平らです。
The turtle's plastron is flat.
A more descriptive, everyday phrase meaning 'belly shell'. Less technical than 腹甲.
このカメは腹の甲羅が黄色い。
This turtle has a yellow plastron.
The protective chest pad worn in fencing.
The loanword directly from French/English, commonly used in fencing contexts.
フェンシングではプラストロンを着用します。
In fencing, you wear a plastron.
A general term for chest protector, used in various sports including fencing. Can be understood but プラストロン is more specific.
胸当てを忘れずに。
Don't forget your chest protector.
A metal breastplate or chest plate, part of a suit of armor.
Refers to a breastplate or cuirass in historical armor. Can be used for the plastron of a suit of armor.
騎士は胸甲を身につけていた。
The knight wore a plastron.
A more general term for chest guard, also used for armor. Less specific than 胸甲.
The starched front of a man's formal shirt, or a decorative front piece on a garment.
Used for the stiff front of a dress shirt or a dickey. Context will clarify.
ワイシャツの胸当てが糊でパリッとしている。
The shirt's plastron is crisp with starch.
The loanword is sometimes used in fashion contexts for a decorative front panel.
このドレスにはレースのプラストロンが付いている。
This dress has a lace plastron.
その胸当ては鉄でできている。
That plastron is made of iron.