flashback

• POS: Noun, Verb (usu participle), Verb (intransitive)
• HYPHEN: flash=back

CIDE DICTIONARY

flashback, n. 

•  a transition (in literary or theatrical works or films) to an earlier event or scene; also, the scene thus introduced.  [WordNet 1.5]
•  An unusually vivid recollection of a prior experience, often one that is traumatic, such as scenes from combat or a criminal assault, or induced by hallucinogenic drugs such as LSD; when accompanied by hallucinations it is called flashback hallucinosis.  [PJC]

OXFORD DICTIONARY

flashback, n. Cinematog. a scene set in a time earlier than the main action.

THESAURUS

flashback

commitment to memory, exercise of memory, hindsight, learning by heart, looking back, memoir, memorization, memorizing, recall, recalling, recollecting, recollection, reconsideration, reflection, remembering, remembrance, reminiscence, retrospect, retrospection, review, rote, rote memory, study

ROGET THESAURUS

flashback

Memory

N memory, remembrance, retention, retentiveness, tenacity, veteris vestigia flammae, tablets of the memory, readiness, reminiscence, recognition, recollection, rememoration, recurrence, flashback, retrospect, retrospection, afterthought, post script, PS, suggestion, prompting, hint, reminder, remembrancer, flapper, memorial, commemoration, note, memo, memorandum, things to be remembered, token of remembrance, memento, souvenir, keepsake, relic, memorabilia, art of memory, artificial memory, memoria technica, mnemonics, mnemotechnics, phrenotypics, Mnemosyne, prompt-book, crib sheet, cheat sheet, retentive memory, tenacious memory, photographic memory, green memory, trustworthy memory, capacious memory, faithful memory, correct memory, exact memory, ready memory, prompt memory, accurate recollection, perfect memory, total recall, celebrity, fame, renown, reputation, remembering, remembered, mindful, reminiscential, retained in the memory, pent up in one's memory, fresh, green, green in remembrance, unforgotten, present to the mind, within one's memory, indelible, uppermost in one's thoughts, memorable, by heart, by rote, without book, memoriter, in memory of, in memoriam, memoria in aeterna, suggestive, manet alta mente repostum, forsan et haec olim meminisse juvabit, absens haeres non erit, beatae memoriae, briefly thyself remember, mendacem memorem esse oportet, memory the warder of the brain, parsque est meminisse doloris, to live in hearts we leave behind is not to die, vox audita peril littera scripta manet, out of sight, out of mind.