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.
âº (of an âattempt to do something) âdetermined and âserious, or done together with âothers: I really made a concerted âeffort to get âinvolved in âcommunity âaffairs. (Definition of concerted from the Cambridge Academic Content Dictionary Â© Cambridge University Press).