English to Portuguese Tech/Engineering Architecture Estilo Gótico

boss, in medieval architecture, keystone used in vaulting to provide a junction for intersecting ribs and to cover the actual complex of mitred joints. In medieval England it was highly developed, but in France it was less developed because of the greater height of French naves. By the 13th century, decorative bosses with naturalistic carving were widely used in England (e.g., in the nave at Westminster Abbey, London, and at Ely Cathedral). In the 14th century, bosses comprising a series of narrative scenes appeared, and in the 15th century, fan vaulting was developed with long, pendantlike bosses.
https://www.britannica.com/technology/boss-architecture

Encontrei "bossagens", "pendentes" e "rosões" (este último termo num documento de pt-br e parece-me que a palavra provém do italiano).

ro·são
nome masculino
Ornato que representa um florão na divisão das abóbadas e na junção das nervuras.
"rosão", in Dicionário Priberam da Língua Portuguesa [em linha], 2008-2021, https://dicionario.priberam.org/rosão [consultado em 05-06-2022].

bos·sa·gem
(francês bossage)
nome feminino
[Arquitectura] Parte de uma construção que sobressai.
"bossagem", in Dicionário Priberam da Língua Portuguesa [em linha], 2008-2021, https://dicionario.priberam.org/bossagem [consultado em 05-06-2022].

Agradeço referências em pt-pt. Obrigada.