Our Academic dictionaries such as the Oxford Dictionary of English use a phonetic symbol system developed by a man called Clive Upton.
You can read about the standard we use here
And for the Oxford Dictionary of System standard here
You can find a list which has all of the word here
There are some subtle differences about the Oxford Phonetic System, but here's a quick rundown:
- For the vowel in BED where EFL texts usually use /e/ he used /ɛ/
- For the vowel in PRICE where EFL texts usually use /aɪ/ he used /ʌɪ/
- For the vowel in BIRD where EFL texts usually use /ɜː/ he used /əː/
- For the vowel in HAIR where EFL texts usually use /eə/ he used /ɛː/
There are some other more subtle differences in for e.g. the description of the vowel in anyway (often /i/ in EFL texts, /ɪ/ in Upton’s) and around the use of secondary stress marks (/ˌ/).