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.
sequestration. n. 1. the act of sequestering or state of being sequestered. 2. (Law) law the sequestering of property. 3. (Chemistry) chem the effective removal of ions from a solution by coordination with another type of ion or molecule to form complexes that do not have the same chemical behaviour as the original ions.