Longman Dictionary of Contemporary English
The Collaborative International Dictionary
Projector \Pro*ject"or\, n. [Cf. F. projeteur.]
One who projects a scheme or design; hence, one who forms fanciful or chimerical schemes.
--L'Estrange.-
an optical instrument which projects an image from a transparency or an opaque image onto a projection screen or other surface, using an intense light and one or more lenses to focus the image. The term projector by itself is usually used for projection of transparent images by passing the light beam through the image; a projector which projects an image of an opaque object is now ususally referred to as an overhead projector. In projection of this latter form the projection is accomplished by means of a combination of lenses with a prism and a mirror or reflector. Specific instruments have been called by different names, such as balopticon, radiopticon, radiopticon, mirrorscope, etc.
Slide projector a projector for displaying images from individual transparencies (slides), each mounted in a separate frame suited to the mechanics of the projector.
movie projector a projector which displays a series of images from a roll of transparent film in rapid sucession, thus giving the impression of showing a scene with motion as it originally was recorded.
overhead projector see projector[2], above.
-->
Wiktionary
n. A device that projects an enlarged image of a photographic slide onto a screen
WordNet
n. projector that projects an enlarged image of a slide onto a screen
Wikipedia
A slide projector is an opto-mechanical device for showing photographic slides.
35 mm slide projectors, direct descendants of the larger-format magic lantern, first came into widespread use during the 1950s as a form of occasional home entertainment; family members and friends would gather to view slide shows, which typically consisted of slides snapped during vacations and at family events. Slide projectors were also widely used in educational and other institutional settings.
Photographic film slides and projectors have mostly been replaced by image files on digital storage media shown on a projection screen by using a video projector or simply displayed on a large-screen video monitor.
Usage examples of "slide projector".
Brooke switched on a slide projector already positioned before a screen and inserted a frame, while Marshall closed a blind to darken the room.
He came in carrying a slide projector which he proceeded to set up on a stand at the back of the room.
The room lights dimmed, and a slide projector at the back of the room winked on.
By contrast, Lee was carrying his own slide projector, for Christ's sake, and all he had to back him up was with this bunch of college kids and a hungover doctor.
He came back with a slide projector, the kind which comes in a small tin suitcase which opens up into a tent-shaped ground-glass screen.
Another gesture and a demon appeared at the back of the room with a slide projector.
He had a wireless control for the slide projector and a choice of pointers.
A note on the lectern said the slide projector in the middle of the table was already loaded and focused, and gave the order of the slides, which had been delivered from the National Reconnaissance Office.
As Langdon loaded his slide projector, he explained that the number PHI was derived from the Fibonacci sequence-a progression famous not only because the sum of adjacent terms equaled the next term, but because the quotients of adjacent terms possessed the astonishing property of approaching the number 1.