overhead projector
US /ˈoʊvərˌhɛd prəˈdʒɛktər/
UK /ˈoʊvərˌhɛd prəˈdʒɛktər/

1.
高射投影儀, 幻燈機
a device that projects an enlarged image of a transparency onto a screen or wall
:
•
The teacher used an overhead projector to display the lesson notes.
老師使用高射投影儀來展示課程筆記。
•
Before PowerPoint, presentations were often made with an overhead projector.
在PowerPoint出現之前,演示文稿通常使用高射投影儀製作。