a: camera obscura b: a device that consists of a lightproof chamber with an aperture fitted with a lens and a shutter through which the image of an object is projected onto a surface for recording (as on film) or for translation into electrical impulses (as for television broadcast). â off camera. 1.
/seÂ·quesÂ·ter/ (se-kwesÂ´ter) 1. to detach or separate abnormally a small portion from the whole. See sequestration and sequestrum. 2. to isolate a constituent of a chemical system by chelation or other means.
HNP: A sequestrated lumbar disc refers to migration of the central nuclear disc material through the outer layers that make up the anulus fibrosis and are then lodged in the spinal canal. Separation of the fragment from the disc from which it originates results in a sequestered fragment. ...Read more.