Forensic Science Vocabulary in English
20 essential forensic science words with meanings, example sentences, and free interactive exercises — ideal for B2–C1 learners.
What You'll Learn
- ✅ Core crime scene vocabulary: evidence, fingerprint, DNA, and trace evidence
- ✅ Laboratory and analysis terms: toxicology, ballistics, and pathologist
- ✅ Legal and procedural words: chain of custody, testimony, and reconstruction
- ✅ How to understand forensic science in news, TV, and academic English
Pedagogically reviewed by LexFizz Team
Forensic science vocabulary appears across a wide range of English contexts: IELTS Academic Reading passages on science and society, Cambridge C1 Advanced texts on criminal justice, news reports on high-profile trials, and popular crime dramas that English learners often watch to improve their listening skills. Understanding these terms, as defined by the Oxford Learner's Dictionaries, helps you engage with all of these sources more effectively.
Forensic science is the application of scientific methods to assist in the investigation of crime and the administration of justice. It bridges biology, chemistry, physics, medicine, and law — which means its vocabulary draws from all of these fields. The 20 words on this page cover the most important terms from each area.
One of the most important concepts in forensic science is Locard's Exchange Principle: every contact between a person and a scene leaves a trace. This principle underlies the search for trace evidence — the tiny fibres, hairs, glass fragments, and soil particles that can connect a suspect to a crime scene.
The legal aspects of forensic science are equally important for vocabulary learners. Terms like chain of custody, testimony, and reconstruction describe how forensic evidence is handled, presented, and used in court proceedings. Understanding these concepts helps you follow trial coverage in English-language news media and understand legal procedural drama in English.
Once you are comfortable with these 20 words, explore our Science and Law & Justice vocabulary pages for related terminology.
Word List
| Word | Meaning | Example Sentence |
|---|---|---|
| evidence | physical material collected and used to prove facts in a legal case | The defence challenged the admissibility of the DNA evidence. |
| fingerprint | the unique pattern of ridges on a person's fingertip used for identification | A fingerprint on the window matched the suspect's record. |
| DNA | genetic material unique to each individual, used for biological identification | DNA from the crime scene was matched to a suspect on the national database. |
| autopsy | a post-mortem examination of a body to determine the cause of death | The autopsy confirmed that the victim died from blunt force trauma. |
| toxicology | the analysis of body fluids and tissues for the presence of drugs or poisons | The toxicology report detected a lethal level of sedatives in the blood. |
| ballistics | the study of firearms, bullets, and the mechanics of projectiles | Ballistics analysis confirmed the bullet came from the same weapon. |
| trace evidence | tiny physical materials transferred between people, objects, and environments | Fibres recovered as trace evidence linked the suspect to the victim's home. |
| chain of custody | the documented sequence of people who handled evidence from collection to court | A break in the chain of custody can make evidence inadmissible in court. |
| specimen | a sample of biological material collected for laboratory analysis | Blood specimens were sent to the laboratory for toxicological screening. |
| testimony | a statement given under oath by a witness or expert in legal proceedings | The pathologist's testimony supported the prosecution's case. |
| pathologist | a medical doctor who examines bodies to determine cause of death | The forensic pathologist performed the autopsy the following morning. |
| crime scene | the location where a crime took place and evidence is gathered | The crime scene was sealed and examined by specialist officers. |
| database | a stored collection of forensic records used to match crime scene samples | Her fingerprints were not found in any national database. |
| identification | the process of establishing the identity of a person or object | Dental records enabled positive identification of the remains. |
| fibre | a thread or filament from clothing or materials found as trace evidence | Fibres from a blue wool coat were found on the victim's clothing. |
| blood spatter | the pattern and distribution of bloodstains used to reconstruct events | Blood spatter analysis indicated the attack occurred near the doorway. |
| digital forensics | the recovery and analysis of evidence from digital devices and networks | Digital forensics recovered deleted messages from the suspect's phone. |
| reconstruction | the process of piecing together the sequence of events at a crime scene | A 3D reconstruction of the scene was presented to the jury. |
| witness | a person who saw an event or has relevant knowledge to give in court | The key witness identified the defendant in a line-up. |
| laboratory | a facility where forensic samples are scientifically analysed | Results from the laboratory took three weeks to process. |
Practice with These Exercises
Wordsearch
Find forensic science words hidden in the grid
Anagram
Unscramble the letters to spell each forensic term
Hangman
Guess the forensic science word letter by letter
Flash Cards
Review forensic vocabulary with spaced repetition
Practice What You've Learned
LexFizz has 30 free interactive exercises — no sign-up needed.
Browse All Exercises →Related Vocabulary Topics
Frequently Asked Questions
What is the difference between evidence and testimony in forensic science?
Evidence is physical material collected, analysed, and presented in court — fingerprints, DNA profiles, fibres, photographs, and digital records. Testimony is a spoken or written statement given under oath by a witness or expert. Physical evidence is often considered more reliable than eyewitness testimony because human memory is fallible, while properly collected and handled physical evidence is objective. Both are used by the court to establish facts.
What does chain of custody mean?
The chain of custody is the unbroken, documented record of every person who handled a piece of evidence, from the moment it was collected at the scene to the moment it was presented in court. Each transfer must be recorded with the time, date, and identity of both parties. Any unexplained break in the chain of custody can lead a judge to rule evidence inadmissible, as it raises doubts about whether the evidence has been tampered with.
What is the difference between an autopsy and a toxicology report?
An autopsy (also called a post-mortem examination) is a physical examination of a body conducted by a pathologist to determine the cause, mechanism, and manner of death. It includes external examination, internal examination of organs, and collection of samples. A toxicology report is a laboratory analysis of biological specimens — blood, urine, stomach contents — for the presence of drugs, alcohol, or poisons. The toxicology report is often a key part of the autopsy findings.
What does a pathologist do in forensic science?
A forensic pathologist is a medical doctor who specialises in examining bodies to determine the cause, mechanism, and manner of death. They perform autopsies, write detailed post-mortem reports, and may give expert testimony in criminal trials. In the UK, forensic pathologists work alongside the police and coroner's office. Their findings help determine whether a death is natural, accidental, suicidal, or homicidal.
What is trace evidence?
Trace evidence consists of tiny physical materials that are transferred when two objects or people come into contact — hair, fibres, glass fragments, paint flakes, soil, pollen, and gunshot residue. The underlying principle, known as Locard's Exchange Principle, states that every contact leaves a trace. Trace evidence collected from a crime scene or victim's clothing can place a suspect at the location or establish contact between two individuals.
What is the role of a database in forensic science?
Forensic databases store millions of records that can be matched against crime scene samples. In the UK, the National DNA Database (NDNAD) holds DNA profiles; IDENT1 stores fingerprint records. When a scene sample matches a record, investigators can rapidly identify a suspect or link multiple crimes. Database matches must still be followed by further investigation and are not automatic convictions.
What does digital forensics involve?
Digital forensics is the recovery and scientific analysis of evidence from digital devices — computers, mobile phones, tablets, external drives, cloud accounts, and network logs. Analysts can recover deleted files, reconstruct browsing history, extract encrypted messages, identify metadata, and map communication networks. Digital forensics is now central to investigations involving cybercrime, fraud, terrorism, and child exploitation.
What is blood spatter analysis?
Blood spatter analysis (also called bloodstain pattern analysis) is the examination of the size, shape, distribution, and directionality of bloodstains at a crime scene. Analysts use the patterns to determine where the blood originated, the direction of travel, the approximate force involved, and the likely positions of individuals during the event. This helps investigators reconstruct the sequence of events and test witness accounts against physical evidence.
Does forensic science vocabulary appear in English exams?
Forensic and crime topics appear in IELTS Academic Reading passages on science and society, and in Cambridge C1 Advanced and C2 Proficiency texts. Scientific procedure vocabulary — specimen, analysis, database, identification, reconstruction — is tested across multiple exam formats. Understanding forensic terminology also helps with general academic and scientific reading skills.
How can I practise forensic science vocabulary?
Use Flash Cards to memorise technical terms and their precise definitions. Watching forensic science documentaries or crime procedural TV dramas in English — with subtitles initially — provides authentic listening input. Reading UK law enforcement publications, Home Office reports, or academic articles on forensic methods develops reading comprehension at C1 level. Wordsearch and Hangman reinforce spelling of multi-syllable terms.