Royal Society Mobile: Thai Dictionary Version B.E 2554 is a revolutionary Thai dictionary featuring a wide coverage of 43,000 words from the legendary Royal Institute’s Dictionary (2011 Edition). It is the richest knowledge repository of Thai words containing parts of speech, pronunciation, definitions, and related words (i.e. hypernymy and hyponymy). You can explore these words via direct search or by alphabetic index and trace back to your search history. It perfectly suits the needs of students, teachers, lecturers, and Thai language enthusiasts. This application is a product of collaboration between Office of the Royal Society and National Electronics and Computer Technology Center (NECTEC).