OSAC Lexicon
The OSAC Lexicon is a compendium of forensic science terms and definitions. This terminology tool was created to help bring consistency and understanding to the way terms are used by the various forensic science. Use of the OSAC Lexicon does not replace the need to reference the original published source.
The terms and definitions in the OSAC Lexicon come from the published literature, including documentary standards and technical reports. It is continually updated with the latest work from OSAC units, as well as terms from newly published documentary standards and standards elevated to the OSAC Registry.
Gradually terms are evaluated and harmonized by the OSAC to a single term. This process results in an OSAC Preferred Term. An OSAC Preferred Term is a term, along with its definition, that has undergone review and evaluation by the FSSB Terminology Task Group and has been approved by the FSSB. The FSSB recommends that subcommittees use OSAC Preferred Terms when drafting standards.
The OSAC Lexicon should be the primary resource for terminology and used when drafting and editing forensic science standards and other OSAC work products.
Root
Rope
Routine Training
Canine training conducted with regularity that maintains the canine's operational capabilities.
Routing Switcher
rubber stamp
(See stamping device.)
Safety Data Sheet Sds
A document providing comprehensive information about a substance or mixture for using in workplace chemical management as adopted by the Globally Harmonized System of Classification and Labeling of Chemicals (GHS). Note: Previously known as a Material Safety Data Sheet (MSDS).
Safety Fuse
Safety Violation
An action by the handler, canine or canine team that if done in operational environment, could place the canine team in jeopardy.
Sample
sample
Subset of a group (i.e., the totality of items under consideration) made up of one or more items (i.e., the individual parts into which that group is divided). NOTE A group may be real and finite, real and infinite, or completely hypothetical.
sample (n)
A group of items, test results, or portions of material, taken from a large collection of items, test results or portions of material, that serves to characterize the larger population
Sample (Representative Sample)
Sample (V)
Obtain the values of a function for regularly or irregularly spaced distinct values fromits domain. From: ISO 2382-2:1976.
Sample, Known
Sample, Limited
Sample, Representative
Sampling
sampling
selection and/or collection of material or data regarding an object of conformity assessment (4.2)
Note 1 to entry: Selection can be on the basis of a procedure, an automated system, professional judgement etc.
Note 2 to entry: Selection and collection can be performed by the same or different persons or organizations.
Sampling Unit
Sanger Sequencing
A method of DNA sequencing for determining the order of bases in a DNA molecule based on the selective incorporation of chain-terminating dideoxynucleotides by DNA polymerase during in vitro DNA replication.
Sanger Sequencing
A method of DNA sequencing for determining the order of bases in a DNA molecule based on the selective incorporation of chain-terminating dideoxynucleotides by DNA polymerase during in vitro DNA replication. See sequencing below.
SAP
Subject Acquisition Profile. With the exception of mobile device SAP levels, they are aseries of sets of progressively more stringent parameters and requirements relevant toface acquisition. Subject Acquisition profiles for iris are denoted as Iris acquisitionprofiles (IAP), and those for fingerprints are denoted as Fingerprint acquisitionprofiles (FAP). The term SAP had been used exclusively for face acquisition in earlierversions of the standard. [2015a>] In the Mobile ID Best Practices RecommendationsVersion 1, face, finger and iris application profiles were all referred to as SAP. Theyare referred to separately in this standard. This was changed in Mobile ID Best Practices Recommendations Version 2 to be consistent with this standard.
Satellite Stain
satellites
Extraneous or undesirable toner particles or ink droplets (see spatter, spray).
Satiation
When a reinforcer loses its effectiveness as a result of being overused.
Saturation Stain
Scales
Scanning Electron Microscopy (SEM)
Scanning Resolution
The number of pixels per unit distance at which an image is captured (ppmm or ppi).
Scar
Healed fibrous tissue resulting from an injury to the skin.
Scarp
Scene
A place, an object, a person, or an animal that is subject to and/or requires forensic examination. NOTE A crime scene is a common description of a scene where a presumed crime has been committed. The scene can be a person or an animal. (ISO 21043-1:2018[E])
NOTE In a situation that involves a potential criminal act definitions in section 3.7 through 3.9 would be preceded by “crime” (e.g., crime scene investigator).
Scene
A place, an object, a person, or an animal that is subject to and/or requires forensic examination
NOTE In a situation that involves a potential criminal act definitions in section 3.1 through 3.5 would be preceded by “crime” (e.g., crime scene investigator).
Scene
The general physical location of a fire or explosion incident (geographic area, structure or portion of a structure, vehicle, boat, piece of equipment, etc.) designated as important to the investigation because it may contain physical damage or debris, evidence, victims, or incident-related hazards.
scene
A place or object that is subject to and/or requires forensic examination. (ISO/FDIS 21043-1:2018[E])
NOTE A crime scene is a common description of a scene where a presumed crime has been committed. The scene can be a person or an animal.
scene
A place, or object that is subject to and/or requires forensic examination. NOTE A crime scene is a common description of a scene where a presumed crime has been committed. The scene can be a person or an animal. (ISO 21043-1)
scene detection
The process of searching for, finding, and demarcating any environment where human remains and material associations, potentially relevant in a medicolegal setting, may be recovered.
Scene Investigation
An examination of a scene to locate, document, process, collect, and preserve items of potential evidentiary value.
NOTE In a situation that involves a potential criminal act definitions in section 3.7 through 3.9 would be preceded by “crime” (e.g., crime scene investigator).
Scene Investigation
An examination of a scene to locate, document, process, collect, and preserve items of potential evidentiary value.
NOTE In a situation that involves a potential criminal act definitions in section 3.1 through 3.5 would be preceded by “crime” (e.g., crime scene investigator).
scene investigation
An examination of a scene to locate, document, process, collect, and preserve items of potential evidentiary value.
scene investigation
An examination of a scene to locate, document, collect, and preserve items of potential evidentiary value.
NOTE Investigations may involve criminal or non-criminal acts. Investigations into presumed criminal acts are referred to as crime scene investigations.
Scene Investigator
An individual, however named, who is responsible for performing elements of scene investigation.
NOTE In a situation that involves a potential criminal act definitions in section 3.7 through 3.9 would be preceded by “crime” (e.g., crime scene investigator).
Scene Investigator
An individual, however named, who is responsible for performing elements of scene investigation.
NOTE In a situation that involves a potential criminal act definitions in section 3.1 through 3.5 would be preceded by “crime” (e.g., crime scene investigator).
scene investigator
An individual, however named, who is responsible for performing elements of scene investigation.
scene investigator
An individual, however named, who is responsible for performing elements of scene investigation.
NOTE Scene investigators are commonly referred to as crime scene investigators. Other personnel assisting in the investigation may also fulfill this role.
scene preservation
The intentional act of preventing and refraining from any activity that may alter a scene or anything contained within the scene.
Scene Reconstruction
The process to gain explicit knowledge of the series of events that surround a scene using deductive and inductive reasoning, physical evidence, scientific processes, and their interrelationships.
NOTE In a situation that involves a potential criminal act definitions in section 3.1 through 3.5 would be preceded by “crime” (e.g., crime scene investigator).
scene reconstruction
The process to gain explicit knowledge of the series of events that surround a scene using deductive and inductive reasoning, physical evidence, scientific processes, and their interrelationships. [ANSI/ASB Std 159]
Scene Reconstructionist
An individual, however named, who is responsible for performing elements of a scene reconstruction.
NOTE In a situation that involves a potential criminal act definitions in section 3.1 through 3.5 would be preceded by “crime” (e.g., crime scene investigator).
scene search
A systematic survey of a demarcated environment that maximizes detection and recovery of data, physical evidence, and human remains, while fully documenting context and minimizing alteration.