名詞 dauphin:

1. formerly, the eldest son of the King of France and direct heir to the throne

dau.phin

n.（名詞）
The eldest son of the king of France from 349 to 830.
王太子：從349到830期間法國國王的長子
Used as a title for such a nobleman.
用作這樣一個貴族的頭銜

來源：
Middle English
中古英語
from Old French [title of the lords of Dauphiné]
源自 古法語 [多芬貴族的稱號]
from Dalphin, Dalfin [a surname]
源自 Dalphin, Dalfin [姓]
from dalfin [dolphin (from the device on the family`s coat of arms)] * see dolphin
源自 dalfin [多芬（從家族盾形紋章的設計而得）] *參見 dolphin