Eldamo (Elvish Data Model), or An Elvish Lexicon, is a linguistic website compiling a full lexicon of all J.R.R. Tolkien's invented languages through his lifetime, not only the Eldarin family. Every entry is extensively sourced, giving detailed analysis of the grammar and phonetic development of Quenya, Sindarin and Adûnaic.
The languages are divided into three periods: Early (1910-1930), Middle (1930-1950) and Late (1950-1973). The website also contains a lexicon of commonly used and well accepted neo-Elvish vocabulary.
The website was launched in 2008, and is maintained by Paul Strack.