n. 飞机整流罩, 外壳

[ noun ]
protective covering consisting of a metal part that covers the engine
<noun.artifact>
there are powerful engines under the hoods of new carsthe mechanic removed the cowling in order to repair the plane's engine

Cowl \Cowl\ (koul), n. [AS. cuhle, cugle, cugele; cf. dial. G.
kogel, gugel, OF. coule, goule; all fr. LL. cuculla,
cucullus, fr. L. cucullus cap, hood; perh. akin to celare to
conceal, cella cell. Cf. {Cucullate}.]
1. A monk's hood; -- usually attached to the gown. The name
was also applied to the hood and garment together.

What differ more, you cry, than crown and cowl?
--Pope.

2. A cowl-shaped cap, commonly turning with the wind, used to
improve the draft of a chimney, ventilating shaft, etc.

3. A wire cap for the smokestack of a locomotive.

4. (aviation) a removable metal covering for an aircraft
engine, providing streamlining to minimize wind
resistance; -- also called {cowling}.
[PJC]

5. a covering for a chimney or other ventilating shaft
functioning to increase the draft.
[PJC]