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Homologation is a technical term, derived from the Greek homologeo (ὁμολογέω) for "to agree", which is generally used in English to signify the granting of approval by an official authority. This may be a court of law, a government department, or an academic or professional body, any of which would normally work from a set of strict rules or standards to determine whether such approval should be given. The word may be considered very roughly synonymous with accreditation, and in fact in French and Spanish may be used with regard to academic degrees (see apostille). Certification is another possible synonym, while to homologate is the infinitive verb form.
In today's marketplace, for instance, products must often be homologated by some public agency to assure that they meet standards for such things as safety and environmental impact. A court action may also sometimes be homologated by a judicial authority before it can proceed, and the term has a precise legal meaning in the judicial codes of some countries.
The equivalent process of testing and certification for conformance to technical standards is usually known as Type Approval in English-language jurisdictions.
Another usage pertains to the biological sciences, where it may describe the similarities used to assign organisms to the same family or taxon, similarities they have jointly inherited from a common ancestor.
Where a racing class requires that the vehicles raced be production vehicles only slightly adapted for racing, manufacturers typically produce a limited run of such vehicles for public sale so that they can legitimately race them in the class. These vehicles are commonly called "homologation specials".
The term is also applicable in the Olympic Games, in venue certifications, prior to the start of competition. An issue was raised at Cesana Pariol—the bobsleigh, luge, and skeleton track used for the 2006 Winter Olympics in Turin—over its safety in luge. This delayed homologation of the track from January 2005 to October 2005 in order to achieve safe runs during luge competitions.
See also 
- Type approval
- Professional certification
- European professional qualification directives
- Homologation reactions that extend an alkyl chain by one methylene (-CH2-) unit
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- Type Approval Specialist
- Worldwide Type Approval Services for 315MHz; 433MHz; 2,4GHz; 24GHz; 77GHz; GSM; UMTS; LTE; Wi-Fi devices; Bluetooth devices; Zigbee devices; WiMAX devices; RFID
- Academic homologation
- Education, recognition of diplomas and NARIC in the European Union
- Academic homologation in Spain
- Certificate of Conformity
- Other Uses