AUの定義と意味 - メリアム・ウェブスター

AU Definition & Meaning - Merriam-Webster Est. 1828 Dictionary Definition abbreviation (1) symbol abbreviation (2) abbreviation 3 abbreviation (1) symbol abbreviation (2) Word History Entries Near Cite this Entry Citation Medical Definition Medical More from M-W Show more Show more Citation Medical More from M-W Save Word To save this word, you'll need to log in. Log In Au 1 of 3 abbreviation (1) author Au 2 of 3 symbol gold AU 3 of 3 abbreviation (2) 1 angstrom unit 2 astronomical unit 3 [Latin aures unitas ] both ears — used especially in audiology and in writing prescriptions Word History Etymology Symbol Latin aurum Browse Nearby Words atypical Au AU See all Nearby Words Cite this Entry Style MLA Chicago APA Merriam-Webster “Au.” Merriam-Webster.com Dictionary , Merriam-Webster, https://www.merriam-webster.com/dictionary/Au. Accessed 2 May. 2026. Copy Citation Medical Definition Au 1 of 2 symbol gold AU 2 of 2 abbreviation 1 angstrom unit 2 antitoxin unit 3 [Latin aures unitas ] both ears — used especially in audiology and in writing prescriptions Etymology Symbol L aurum More from Merriam-Webster on Au Britannica.com: Encyclopedia article about Au Love words? Need even more definitions? Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free! Merriam-Webster unabridged More from Merriam-Webster Word of the Day exasperate See Definitions and Examples » Get Word of the Day daily email! Popular in Grammar & Usage See More More Commonly Mispronounced Words 5 Verbal Slip Ups and Language Mistakes Is that lie 'bald-faced' or 'bold-faced'? The Difference Between 'i.e.' and 'e.g.' Why is '-ed' sometimes pronounced at the end of a word? See More Popular in Wordplay See More The Longest Long Words List 9 Other Words for Beautiful The Words of the Week - May 1 Was 'nervous Nellie' a Real Person? 12 Lovely and Unusual Words for the Natural World See More Popular See More More Commonly Mispronounced Words The Longest Long Words List 9 Other Words for Beautiful See More Games & Quizzes See All Quordle Can you solve 4 words at once? Play Blossom Pick the best words! Play The Missing Letter A daily crossword with a twist Play Name That Tree! A quiz that’s all bark, no bite. Take the quiz See All