Aircraft Encyclopedia
http://www.flugzeuginfo.net/acdata_en.php

ArtLex. Art Dictionary
http://www.artlex.com/

Biology-Online Dictionary
http://www.biology-online.org/dictionary/Main_Page

British Museum. Materials Thesaurus
http://www.collectionslink.org.uk/assets/thesaurus_bmm/matintro.htm?phpMyAdmin=OYNyINPdn3sQmoXugKH1gcCLSW0

British Museum. Object Names Thesaurus
http://www.collectionslink.org.uk/assets/thesaurus_bmon/Objintro.htm?phpMyAdmin=OYNyINPdn3sQmoXugKH1gcCLSW0

Dictionary of Agricultural Machinery and Tools
http://museum.zib.de/museumsvokabular/documents/ackerbau.pdf

Dictionary of Automotive Terms
http://www.motorera.com/dictionary/index.htm

Dictionary terms for crockery
http://museum.zib.de/museumsvokabular/index.php?main=demo-sgml

Encyclopedic Dictionary of Astronomy Terms
http://astronomija.lt/enciklopedija/index.php/Astronomija

Encycplopedia of Textile Terms (Encyklopedia Włókiennicza)
http://wskalski.republika.pl/

English Heritage. The Thesaurus of Monuments Types
http://thesaurus.english-heritage.org.uk/frequentuser.htm

EUROVOC, the EU’s Multilingual Thesaurus
http://www3.lrs.lt/pls/inter/w5_show?p_r=1637&p_k=1

GEMET, the General Multilingual Environmental Thesaurus
http://www.eionet.europa.eu/gemet/index_html?langcode=lt

GeoNames geographical database
http://www.geonames.org/

Getty Art & Architecture Thesaurus
http://www.getty.edu/research/conducting_research/vocabularies/aat/

Getty Thesaurus of Geographic Names
http://www.getty.edu/research/conducting_research/vocabularies/tgn/

Getty Union List of Artist Names
http://www.getty.edu/research/conducting_research/vocabularies/ulan/

Iconclass, a multilingual classification system for cultural content
http://www.iconclass.org/

Lithuanian Place-Names
http://www.vlkk.lt/lit/nutarimai/lietuvos-vietovardziai.html

Mammal Species of the World
http://vertebrates.si.edu/mammals/msw/

Mineralogy. Alphabetical List
http://un2sg4.unige.ch/athena/mineral/minppmi.html

Nederlandstalig Art & Architecture Thesaurus
http://www.aat-ned.nl/index.html

NMR Archaeological Sciences Thesaurus
http://thesaurus.english-heritage.org.uk/thesaurus.asp?thes_no=560

Term Bank of the Republic of Lithuania
http://terminai.vlkk.lt/pls/tb/tb.search

Textile Dictionary
http://www.fabriclink.com/dictionaries/textile.cfm

Thesaurus for Graphic Materials
http://www.loc.gov/rr/print/tgm1/

UK Archival Thesaurus UKAT
http://www.ukat.org.uk/

UNESCO Multilingual Thesaurus for the fields of education, culture, natural sciences, social and human sciences, communication and information
http://databases.unesco.org/thesaurus/