A sudden, usually temporary increase in number or quantity: The baby boom created a bulge in school enrollment. v. bulged, bulgÂ·ing, bulgÂ·es. v.intr. To swell, protrude, or curve outward: a wall bulging after a flood; muscles bulging under a shirt. v.tr. To cause to bulge. [Middle English, pouch, from Old French bulge, bouge, from Latin bulga, bag, of Celtic origin; see bhelgh-in Indo-European roots.] bulgâ²iÂ·ness n. bulgâ²y adj. Synonyms: bulge, balloon, belly, jut, project, protrude These verbs mean to curve, spread, or extend outward past the normal or usual limit: a wallet bulging with money; a clown's pants that ballooned at the waist; a sail bellying in the wind; a boulder jutting from the hillside; a deck that projected from the house in back; eyes protruding from ...
One of the key components of the optical system of many compound microscopes is a condenser. A condenser is a lens that serves to concentrate light from the illumination source that is in turn focused through the object and magnified by the objective lens. It is a basic component of almost all compound light microscopes manufactured since the 19th Century.
The main components of the light microscope include the objectives, the eyepieces, the specimen stage and specimen holder, the light source, the field diaphragm, the condenser and aperture, and the coarse and fine focus knobs.