First recorded in 1960–65.
Comes from petro-, a combining form meaning \"rock,\" and ichor, which in classical mythology means “ethereal fluid flowing in the veins of the gods.”
Sign up for more Word of the Day!

\r\nEXAMPLES OF PETRICHOR\r\n

The desert landscape was quickly transformed as petrichor filled the air after a long-awaited rainstorm.
As the storm passed, leaving behind puddles and damp earth, the sweet petrichor lingered like a fond memory.

\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/NEW2016/petrichor_000.mp3","definitions":[{"partofspeech":"noun","data":"a distinctive scent, usually described as earthy, pleasant, or sweet, produced by rainfall on very dry ground."}],"examples":[],"imageUrl":"https://www.dictionary.com/e/wp-content/uploads/2024/03/petrichor_IG.png","accentColor":"#0063D7"}},"status":"succeeded"}},"meta":{"requestId":"EbCqyhjgE3RwR01F2ueyX","requestStatus":"fulfilled"}},{"type":"fetchWordsNearby/fulfilled","payload":{"data":{"before":[{"slug":"roots-music","entry":"roots music"},{"slug":"rootstalk","entry":"rootstalk"},{"slug":"rootstock","entry":"rootstock"},{"slug":"root-system","entry":"root system"},{"slug":"root-test","entry":"root test"}],"after":[{"slug":"root--up","entry":"root up"},{"slug":"rootworm","entry":"rootworm"},{"slug":"rooty","entry":"rooty"},{"slug":"r-o-p","entry":"R.O.P."},{"slug":"ropable","entry":"ropable"}]}},"meta":{"arg":{"word":"root-treatment"},"requestId":"UG4JPR1k1-zwDt_6vOizW","requestStatus":"fulfilled"}},{"type":"luna/fetchExampleSentences/fulfilled","payload":{"data":{"tdb":[],"gbg":[]}},"meta":{"arg":{"word":"root-treatment"},"requestId":"lbpiaIYvtgu9q3tDladbo","requestStatus":"fulfilled"}},{"type":"fetchDictionaryResults/fulfilled","payload":{"slugs":[{"entries":[{"__typename":"CollinsEntry","headword":{"displayForm":"root treatment","slug":"root-treatment"},"homonym":null,"note":null,"origin":null,"partOfSpeechGroups":[{"definitions":[{"crossReferencesConnection":{"edges":[]},"definitionSetChunks":"[{\"text\": \"dentistry\", \"type\": \"lb_subject_field\"}, {\"type\": \"defgrp\", \"children\": [{\"text\": \"a procedure, used for treating an abscess at the tip of the root of a tooth, in which the pulp is removed and a filling (\", \"type\": \"text\"}, {\"text\": \"root filling\", \"type\": \"bold\"}, {\"text\": \") inserted in the root canal\", \"type\": \"text\"}]}, {\"text\": \"Also calledroot-canal therapy\", \"type\": \"text\"}]","examples":[],"idiom":null,"ordinal":1,"sense":null,"subdefinitions":[]}],"ordinal":1,"partOfSpeech":"noun"}],"pronunciations":[],"subEntry":[]}],"url":"root-treatment"}]},"meta":{"arg":{"slug":"root-treatment"},"requestId":"ttq5KatVCofsbpy2lnWHK","requestStatus":"fulfilled"}},{"type":"fetchResultsData/fulfilled","payload":{"data":{"url":"root-treatment","displayForm":"root treatment","canonicalSlug":"root-treatment","content":[{"source":"collins","entries":[{"id":"u11d1def534ea1be0.1a3ea532.11d23f20eca.6cbe.1","type":"normal","entry":"root treatment","entrySyllabified":null,"entryVariants":"","homograph":null,"pronunciation":{"audio":null,"spell":null,"ipa":""},"predefinitionContent":"","posBlocks":[{"pos":"noun","posSupplementaryInfo":"","definitions":[{"order":1,"type":"simple","predefinitionContent":"dentistry","definition":"a procedure, used for treating an abscess at the tip of the root of a tooth, in which the pulp is removed and a filling (root filling) inserted in the root canal","postdefinitionContent":"Also called: root-canal therapy"}]}],"origin":"","supplementaryNotes":[],"variantForms":[],"referenceData":[],"relatedForms":[],"derivedForms":[]}]}],"nearbyWordOrdinal":132562,"index-rank-01":["root treatment"],"index-rank-02":[],"index-rank-03":[],"index-rank-04":[],"index-rank-05":[],"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":[],"tunaSlug":null,"isFeaturedMetaSlug":false}},"meta":{"arg":{"word":"root-treatment"},"requestId":"1FmndoWWZgUt672Gbb9Ff","requestStatus":"fulfilled"}},{"type":"fetchSpellSuggestions/fulfilled","payload":{"data":{"luna":[],"tuna":[],"lunaWithSlug":[],"tunaWithSlug":[]}},"meta":{"arg":{"word":"root-treatment"},"requestId":"uYdv5PH_JjQQhUwcAL8wR","requestStatus":"fulfilled"}}]},"actionData":null,"errors":null}

root treatment

noun

Word of the Day