Home › Words › P › poitrinepoitrine/ˈpɔɪ.tɹin/poitrine means the breastplate of a knight's armour.Among words judged in Lexicurio's Arena, poitrine ranks #9,836 of 42,752 for Qualifying.poitrine is pronounced /ˈpɔɪ.tɹin/.EtymologyFrom French poitrine or a Middle or Old French predecessor.nounThe breastplate of a knight's armour.Synonym of poitrel (“chest-armor for a horse”).Chest, bosom, especially of a woman.Definitions & examples from Wiktionary (CC BY-SA 3.0).