Some mainstream English dictionaries from across the English-speaking world affirm a sense of "acronym" which does not require being pronounced as a word. American English dictionaries such as "Merriam-Webster", Dictionary.com's "Random House Webster's Unabridged Dictionary" and the "American Heritage Dictionary" as well as the British "Oxford English Dictionary" and the Australian "Macquarie Dictionary" all include a sense in their entries for "acronym" equating it with "initialism", although "The American Heritage Dictionary" criticizes it with the label "usage problem". However, many English language dictionaries, such as the