TSD

distance

(dis'tans) [L. distantia, remoteness] The space between two objects.

focal distance

In ophthalmology, the distance from the optical center of a lens to the focal point.

focal-film distance

Abbreviation: FFD
Focus-film distance.

focus-film distance

Abbreviation: FFD
In radiography, an obsolete term for source-to-image receptor distance. Synonym: focal-film distance See: source-to-image receptor distance

hearing distance

The distance at which a given sound can be heard.

infinite distance

1. A distance without limits. 2. In ophthalmology, the assumption that the light rays coming from a point of a distance beyond 20 ft (6.1 m) are practically parallel and accommodation is unnecessary.

interocclusal distance

The distance between the occlusal surfaces of opposed teeth when the mandible is at rest.

interocular distance

In ophthalmology, the distance between the eyes. See: hypertelorism

interpupillary distance

In ophthalmology, the distance between the centers of the pupils of the eyes.

margin crease distance

In ophthalmology, the height that the crease of the eyelid sits above the upper eyelid margin when the eye is positioned in primary gaze.

object-film distance

Abbreviation: OFD
In radiography, an obsolete term for object-image receptor distance.

object-image receptor distance

Abbreviation: OID
In radiography, the distance between the anatomical structure to be imaged and the radiographic image receptor.

source-object distance

Abbreviation: SOD
In radiography, the distance between a source of radiation and the object that it images or radiates.

source-skin distance

In radiography, the distance from a radiation source to a patient's skin.

source-to-image receptor distance

Abbreviation: SID
In radiography, the distance from the x-ray tube to the radiographical film or the image receptor.

target-skin distance

Abbreviation: TSD
1. In radiography, the distance from the source of radiation to the point where the beam enters the patient.2. In radiation therapy, a common value used for determination of the depth at which the treatment time is calculated.

target-skin distance

TSD

Acronym	Definition
TSD➣Technology and Sustainable Development (various locations)
TSD➣Thread-Specific Data
TSD➣Technical Support Document
TSD➣Tang Soo Do (martial arts)
TSD➣Technical Services Department (various organizations)
TSD➣Tay Sachs Disease
TSD➣Telecommunication Systems Division
TSD➣Transportation Sensor Data
TSD➣Transmission System Dependent Layer
TSD➣Technology Support Division
TSD➣Total Service Desk
TSD➣Transient Storage Device
TSD➣Temporary Storage Definitions
TSD➣Thermal Shut Down
TSD➣Transient Signal Detector
TSD➣True Speech Decoder
TSD➣Task Scheduler Install Disk
TSD➣Transient Suppression Device
TSD➣Thermal Shut Down (electronics)
TSD➣Treatment, Storage, or Disposal
TSD➣Texas School for the Deaf
TSD➣Technical Services Division
TSD➣Technology Solutions Division (SYNNEX Corp.)
TSD➣Temperature-Dependent Sex Determination
TSD➣Thailand Securities Depository Co., Ltd. (Bangkok, Thailand; est. 1994)
TSD➣Technical Standards Document (various locations)
TSD➣Tennessee School for the Deaf
TSD➣Technology Services Division
TSD➣Technical Service Desk (various schools)
TSD➣Taylor School District (Taylor, MI)
TSD➣Tacoma School District (Tacoma, WA)
TSD➣Transaction Services Division
TSD➣The Silent Death (gaming)
TSD➣Technical Support Department
TSD➣Teacher Support and Development (California)
TSD➣Traffic Situation Display (air traffic control)
TSD➣Transportation Safeguards Division
TSD➣Training Support Division
TSD➣Taxable Status Date (real estate)
TSD➣Tactical Situation Display
TSD➣Test and Evaluation Standards Division
TSD➣Tillamook School District (Oregon)
TSD➣Total System Design
TSD➣Tivoli Service Desk
TSD➣Type Specific Driver
TSD➣Trust for Sustainable Development (British Columbia)
TSD➣Tables sur Disquette (French: Tables on Diskette; Canada Pension Plan)
TSD➣Technical System Design
TSD➣Tell-Show-Do (communication method)
TSD➣Taxpayer Service Division (various locations)
TSD➣The Starship Destiny (comic)
TSD➣Telecommunications & Systems Division (Philips International)
TSD➣Test Start Date
TSD➣TechShot Digital (India)
TSD➣Training Systems Development
TSD➣Technical Specification Document
TSD➣Thru-Short-Delay
TSD➣Theatre Studies & Drama
TSD➣Treater, Storer, Disposer (EPA)
TSD➣Traffic Speed Deflectometer (Greenwood Engineering)
TSD➣Touch-Sensitive Display
TSD➣Tactical Surveillance Demonstration
TSD➣Through-Short-Delay
TSD➣Tamino Schema Definition (XML schema)
TSD➣Transmit Selection Diversity
TSD➣To-Shin Do (Japanese/American martial art)
TSD➣Tri-State Delivery, Inc.
TSD➣Training Simulation Division
TSD➣Technical Scope Document
TSD➣Team Start Date
TSD➣The Shining Darkness
TSD➣Technical Service Description
TSD➣Tomb Sweeping Day (Qing Ming Jie)
TSD➣That Sounds Dirty
TSD➣Tactical Support Demonstration
TSD➣Trailer Suction Dredger
TSD➣Tactical Support Division
TSD➣Theater Shipping Document
TSD➣Transmission Systems Directorate
TSD➣Total Stopping Distance
TSD➣Two-Step Diagnosis
TSD➣Threats Support Division
TSD➣Terminal Software Development
TSD➣Tentative Ship Date