English pronunciation of “billionth”

billionth

uk How to pronounce billionth ordinal number in British English
us How to pronounce billionth ordinal number in American English
uk How to pronounce billionth noun in British English
us How to pronounce billionth noun in American English

(English pronunciations of “billionth” from the Cambridge Advanced Learner's Dictionary & Thesaurus and from the Cambridge Academic Content Dictionary, both sources © Cambridge University Press)