hologram

the word 'hologram' is a modern scientific term constructed from classical greek roots. the first element, 'holo-', derives from the greek adjective 'holos', meaning 'whole' or 'complete'. the second element, '-gram', originates from the greek noun 'gramma', signifying a written character, a drawing, or a record. the term was coined in the mid-20th century to describe a new photographic technique that records not just the intensity of light (like a normal photograph) but also its phase, thereby capturing the 'whole' or complete light field of a scene. thus, a hologram is literally a 'complete record' of the visual information of an object, which allows for the reconstruction of a three-dimensional image.

Structure: holo (whole) + gram (something written or recorded) holo - from greek 'holos', meaning 'whole', 'entire', or 'complete'. it functions as a combining form indicating entirety. gram - from greek 'gramma', meaning 'something written', 'a letter', or 'a record'. it functions as a suffix denoting something drawn or recorded.