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.
A cartridge that does not contain primer, propellant, or explosive charge and therefore cannot befired.
A cartridge that does not contain primer, propellant, or explosive charge and therefore cannot be fired
Digital versatile disc
Digital video recorder; A stand-alone embedded system or a computer-based system for recording video and, optionally, audio data
Soluble substances that add color to textiles
The removal of the dye from a fiber by incubating it in an appropriate solvent
the removal of the dye from a fiber by incubating the fiber(s) in an appropriate solvent.
see dynamic headspace concentration.
see dynamic headspace concentration.
An extraction technique in which a portion of the headspace vapors is exchanged from the sample container and concentrated onto an adsorbent medium through applied positive or negative pressure
an extraction technique in which a portion of the headspace vapors is exchanged from the sample container and concentrated onto an adsorbent medium through applied positive or negative pressure.
an extraction technique in which a portion of the headspace vapors is exchanged from the sample container and concentrated onto an adsorbent medium through applied positive or negative pressure.
(1) in image analysis, the difference between the brightest highlight and darkest value that a sensor can detect and record in a single image; (2) in audio and video analysis, the ratio of the strongest (undistorted) signal to that of the weakest (discernible) signal in a unit or system as expressed in decibels (dB); (3) a way of stating the maximum signal-to-noise ratio
(1) in image analysis, the difference between the brightest highlight and darkest value that a sensor can detect and record in a single image; (2) in audio and video analysis, the ratio of the strongest (undistorted) signal to that of the weakest (discernible) signal in a unit or system as expressed in decibels (dB); (3) a way of stating the maximum signal-to-noise ratio.
The difference between the brightest highlight and darkest value that a sensor can detect and record in a single image.
A general term given to a class of explosives in which the principal organic energetic material is usually NG and/or EGDN; or other explosive oils. DISCUSSIO(1) Usually inorganic oxidizers such as nitrate salts and plant material are also included. (2) It should be noted that this does not describe 'military' type dynamites.
This stands for two separate application profiles of the ANSI/NIST-ITL standard:a) Acronym for the FBI's application profile of the ANSI/NIST-ITL standard:Electronic Biometric Transmission Specification.b) Acronym for the US Department of Defense's application profile of theANSI/NIST-ITL standard: Electronic Biometric TransmissionSpecification.
An instrument that uses an electrostatic charge along with toner distribution as the mechanism to visualize paper fiber disturbances (for example, indentations and erasures).
Extended Feature Set for markup of friction ridge data [2015a>]as defined in fields9.300-9.399 [
Temperatures reached in fires that produce physical effects that can be related to specific temperature ranges.
Any paint pigment that is designed to produce a significant change in color attribute(s) in a paint film when the film is viewed or illuminated from varied angles
Any paint pigment that is designed to produce a significant change in color attribute(s) in a paint film when the film is viewed or illuminated from varied angles.
The FBI's earlier application profile of the ANSI/NIST-ITL standard: Electronic FingerprintTransmission Specification. It has been superseded by EBTS.
The polymeric backbone of a pressure sensitive adhesive imparting elastic properties, for example, rubber
The polymeric backbone of a pressure sensitive adhesive imparting elastic properties, for example, rubber.
A material that can be deformed but when the forces are removed it returns to its original form. Serves as the base material for pressure sensitive adhesives.
A disease of the elbow joint of canines caused by growth disturbances in the elbow joint.
A disease of the elbow joint of canines caused by growth disturbances in the elbow joint.
A small, incandescent particle created by some arcs.
Regulates interception of wire and electronic communications (18 USC 2510 et seq.) and retrieval of stored wire and electronic communications (18 USC 2701 et seq.)
The complete longitudinal electronic dental history of an individual
Electron beam instrument designed for quantitative X-ray analysis (electron probe microanalysis)
A broad concept that includes public or private information stored in an electronic or digital medium, such as data available from computers (including email), CD-ROM discs, DVDs, Internet, cloud storage, personal digital assistants (PDAs), smart phones, tablets, GPS systems, satellites, and drones. ESI includes writings, drawings, graphs, charts, photographs, sound recordings, images, video recordings, data compilations, computer-aided design files such as blueprints or maps, metadata, equipment/process control and data logging system files, and any other data that is stored electronically.
A plot of fluorescence units over time showing the measured peaks of a DNA molecule atvarious genetic locations.
A technique used in laboratories to separate macromolecules based on size and charge. Negatively charged molecules (e.g. DNA and RNA) migrate towards a positively charged pole through a sieving matrix, which permits a size-dependent separation.
The examination of (writing) indentations of paper.
An instrument that uses electrostatic charge as the mechanism to visualize paper fiber disturbances (for example, indentations, erasures, typewritten material/lift off).
The process of using an electrostatic charge to transfer dry origin impressions from the substrate to a film.
The process of using an electrostatic charge to transfer dry origin impressions from the substrate toa film.
In XML, an element is a building block delimited by a start-tag (for example:) and an end-tag (for example: ). Everything between thestart-tag and the end-tag of the element (exclusive) is called the element's content. Thefields, subfields, and information items used by traditional-encoding (non-XML)are all represented by XML elements in this encoding.
Searchable collection of elimination profiles