pontoon

名词 pontoon:

1. (nautical) a floating structure (as a flat-bottomed boat) that serves as a dock or to support a bridge
2. a float supporting a seaplane

pon.toon

n.（名词）
A floating structure, such as a flat-bottomed boat, that is used to support a bridge.
浮舟：用于支撑浮桥的船只，可以轻易移动的建造物，如平底船
A floating structure serving as a dock.
浮码头：漂浮在水上的用作码头的结构
A float on a seaplane.
浮筒：漂浮在海面上的浮筒

来源：
French ponton
法语 ponton
from Old French
源自 古法语
from Latin pontô pontôn- [floating bridge]
源自 拉丁语 pontô pontôn- [浮桥]
from pôns pont- [bridge] * see pent-
源自 pôns pont- [桥梁] *参见 pent-