First recorded around 1765–75.
A variant of flabagast, which may be a combination of flabb(y), \"hanging loosely or limply\" or flap, \"a blow given with something broad and flat,\" and aghast, \"struck with overwhelming shock.\"
Sign up for more Word of the Day!

\r\nEXAMPLES OF FLABBERGAST\r\n

The magician's disappearing act never failed to flabbergast the audience.
The unexpected news about the new mayor flabbergasted the community.

\r\nIt's National Poetry Month, and we’ve created a challenge that really is for everyone. Submit now!","audio":"https://static.sfdict.com/audio/F01/F0183700.mp3","definitions":[{"partofspeech":"verb","data":"to overcome with surprise and bewilderment; astound."}],"examples":[],"imageUrl":"https://www.dictionary.com/e/wp-content/uploads/2024/03/flabbergast_IG.png","accentColor":"#0063D7"}},"status":"succeeded"}},"meta":{"requestId":"jqe75X5swuDRG14XqQr_Y","requestStatus":"fulfilled"}},{"type":"fetchWordsNearby/fulfilled","payload":{"data":{"before":[{"slug":"stannic-sulphide","entry":"stannic sulphide"},{"slug":"stanniferous","entry":"stanniferous"},{"slug":"stannite","entry":"stannite"},{"slug":"stannous","entry":"stannous"},{"slug":"stannous-chloride","entry":"stannous chloride"}],"after":[{"slug":"stannum","entry":"stannum"},{"slug":"stanovoi","entry":"Stanovoi"},{"slug":"stanovoi-range","entry":"Stanovoi Range"},{"slug":"stans","entry":"Stans"},{"slug":"st--anthony-s-cross","entry":"St. Anthony's cross"}]}},"meta":{"arg":{"word":"stannous-fluoride"},"requestId":"NSU24UXKk_nsL6aGEWbJt","requestStatus":"fulfilled"}},{"type":"luna/fetchExampleSentences/fulfilled","payload":{"data":{"tdb":[],"gbg":[]}},"meta":{"arg":{"word":"stannous-fluoride"},"requestId":"DcVZkkanESKdPvy1XEcT2","requestStatus":"fulfilled"}},{"type":"fetchDictionaryResults/fulfilled","payload":{"slugs":[{"entries":[{"__typename":"Entry","audioPronunciations":[],"confusableNotes":[],"genderNotes":[],"grammarNotes":[],"headword":{"displayForm":"stannous fluoride","slug":"stannous-fluoride"},"idioms":[],"orderKey":99999010,"ordinal":10,"origin":null,"partOfSpeechBlock":[{"definitions":[{"antonymsConnection":{"edges":[]},"definitionSetChunks":"[{\"type\": \"def\", \"children\": [{\"text\": \"a white, crystalline powder, SnF\", \"type\": \"text\"}, {\"text\": \"2\", \"type\": \"text\"}, {\"text\": \", slightly soluble in water: used as a source of fluorine in the prevention of dental caries, especially as a toothpaste additive.\", \"type\": \"text\"}]}]","examples":[],"ordinal":1,"subdefinitions":[],"synonymsConnection":{"edges":[]}}],"inflectionSets":[],"labelSet":null,"ordinal":1,"partOfSpeech":"noun"}],"pronunciationNotes":[],"pronunciationSet":null,"relatedFormSets":[],"sensitiveNotes":[],"spellingNotes":[],"synonymStudy":[],"usageAlerts":[],"usageNotes":[],"variants":[],"verbPhrases":[]}],"url":"stannous-fluoride"}]},"meta":{"arg":{"slug":"stannous-fluoride"},"requestId":"3mcl01n5sWk03tPx0QWTL","requestStatus":"fulfilled"}},{"type":"fetchResultsData/fulfilled","payload":{"data":{"url":"stannous-fluoride","displayForm":"stannous fluoride","canonicalSlug":"stannous-fluoride","content":[{"source":"luna","entries":[{"id":"u3bb48a285cbafaf0.-3bc55cee.14d9e78a4a4.-4fc8","type":"normal","entry":"stannous fluoride","entrySyllabified":"stannous fluoride","entryVariants":[],"homograph":null,"pronunciation":null,"predefinitionContent":"","posBlocks":[{"definitions":[{"order":1,"type":"simple","predefinitionContent":"","postdefinitionContent":"","definition":"a white, crystalline powder, SnF2, slightly soluble in water: used as a source of fluorine in the prevention of dental caries, especially as a toothpaste additive.","synonyms":"","antonyms":"","cites":[]}],"pos":"noun","posSupplementaryInfo":""}],"origin":null,"originData":null,"supplementaryNotes":[],"variantForms":["Also called tin difluoride, tin fluoride. "],"variantSpellings":[],"referenceData":[],"relatedForms":[],"confusables":[]}]}],"nearbyWordOrdinal":147393,"index-rank-01":["stannous fluoride"],"index-rank-02":[],"index-rank-03":["tin fluoride"],"index-rank-04":["stannous fluoride's","stannous fluorides","stannous fluorides'"],"index-rank-05":["tin fluoride's","tin fluorides","tin fluorides'"],"index-rank-06":[],"index-rank-07":[],"index-rank-08":[],"index-rank-09":[],"index-rank-10":[],"index-rank-11":[],"index-rank-12":[],"index-rank-13":[],"index-rank-14":[],"index-rank-15":[],"categoryId":"44","complexityScore":0.505683464802696,"gradeLevel":"college","tunaSlug":null,"isFeaturedMetaSlug":false}},"meta":{"arg":{"word":"stannous-fluoride"},"requestId":"gr_316NlhYyWZsRs-ubIK","requestStatus":"fulfilled"}},{"type":"fetchSpellSuggestions/fulfilled","payload":{"data":{"luna":[],"tuna":["stones","stanza","stannic","stuns","stands","status","strenuous","setaceous","setarious","stance","sterns","sinuous","stanzas","sternness","tenuous","spinous","stainings","tonus","sadness","stalins","saturns","stand","stouts","stenosis","studious","stagings","stairs","stakings","statings","stayings","strains","stasis","statues","sands","sinus","stain","seasons","stank","stops","tawnies","saneness","savannas","subitaneous","saints","santas","tetanus","senors","settings","sittings","stinks","stints","stunts","mutinous","stacks","stages","stakes","stales","starts","states","stinko","staginess","staidness","stainless","staleness","stallions","starkness","staunches","seniors","strings","stunner","coetaneous","st nicks","st. nicks","0's and 1's"],"lunaWithSlug":[],"tunaWithSlug":[{"displayForm":"stones","slug":"stones"},{"displayForm":"stanza","slug":"stanza"},{"displayForm":"stannic","slug":"stannic"},{"displayForm":"stuns","slug":"stuns"},{"displayForm":"stands","slug":"stands"},{"displayForm":"status","slug":"status"},{"displayForm":"strenuous","slug":"strenuous"},{"displayForm":"setaceous","slug":"setaceous"},{"displayForm":"setarious","slug":"setarious"},{"displayForm":"stance","slug":"stance"},{"displayForm":"sterns","slug":"sterns"},{"displayForm":"sinuous","slug":"sinuous"},{"displayForm":"stanzas","slug":"stanzas"},{"displayForm":"sternness","slug":"sternness"},{"displayForm":"tenuous","slug":"tenuous"},{"displayForm":"spinous","slug":"spinous"},{"displayForm":"stainings","slug":"stainings"},{"displayForm":"tonus","slug":"tonus"},{"displayForm":"sadness","slug":"sadness"},{"displayForm":"stalins","slug":"stalins"},{"displayForm":"saturns","slug":"saturns"},{"displayForm":"stand","slug":"stand"},{"displayForm":"stouts","slug":"stouts"},{"displayForm":"stenosis","slug":"stenosis"},{"displayForm":"studious","slug":"studious"},{"displayForm":"stagings","slug":"stagings"},{"displayForm":"stairs","slug":"stairs"},{"displayForm":"stakings","slug":"stakings"},{"displayForm":"statings","slug":"statings"},{"displayForm":"stayings","slug":"stayings"},{"displayForm":"strains","slug":"strains"},{"displayForm":"stasis","slug":"stasis"},{"displayForm":"statues","slug":"statues"},{"displayForm":"sands","slug":"sands"},{"displayForm":"sinus","slug":"sinus"},{"displayForm":"stain","slug":"stain"},{"displayForm":"seasons","slug":"seasons"},{"displayForm":"stank","slug":"stank"},{"displayForm":"stops","slug":"stops"},{"displayForm":"tawnies","slug":"tawnies"},{"displayForm":"saneness","slug":"saneness"},{"displayForm":"savannas","slug":"savannas"},{"displayForm":"subitaneous","slug":"subitaneous"},{"displayForm":"saints","slug":"saints"},{"displayForm":"santas","slug":"santas"},{"displayForm":"tetanus","slug":"tetanus"},{"displayForm":"senors","slug":"senors"},{"displayForm":"settings","slug":"settings"},{"displayForm":"sittings","slug":"sittings"},{"displayForm":"stinks","slug":"stinks"},{"displayForm":"stints","slug":"stints"},{"displayForm":"stunts","slug":"stunts"},{"displayForm":"mutinous","slug":"mutinous"},{"displayForm":"stacks","slug":"stacks"},{"displayForm":"stages","slug":"stages"},{"displayForm":"stakes","slug":"stakes"},{"displayForm":"stales","slug":"stales"},{"displayForm":"starts","slug":"starts"},{"displayForm":"states","slug":"states"},{"displayForm":"stinko","slug":"stinko"},{"displayForm":"staginess","slug":"staginess"},{"displayForm":"staidness","slug":"staidness"},{"displayForm":"stainless","slug":"stainless"},{"displayForm":"staleness","slug":"staleness"},{"displayForm":"stallions","slug":"stallions"},{"displayForm":"starkness","slug":"starkness"},{"displayForm":"staunches","slug":"staunches"},{"displayForm":"seniors","slug":"seniors"},{"displayForm":"strings","slug":"strings"},{"displayForm":"stunner","slug":"stunner"},{"displayForm":"coetaneous","slug":"coetaneous"},{"displayForm":"st nicks","slug":"st%20nicks"},{"displayForm":"st. nicks","slug":"st.%20nicks"},{"displayForm":"0's and 1's","slug":"0%27s%20and%201%27s"}]}},"meta":{"arg":{"word":"stannous-fluoride"},"requestId":"d2hNqvw7w0Qnn6ygDLRbv","requestStatus":"fulfilled"}}]},"actionData":null,"errors":null}

stannous fluoride

noun

Word of the Day