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Definition of sulfa
sulfa
/ˈsʌl.fə/
(UK: sulpha)
sul · fa
Plural:sulfas
•Adjective:sulfa
sulfa Lexical Profile
CEFR
C1
Grade
11
Tier
2
Usage
Rare
Syllables
2
sulfa Game Scores & Validity
Scrabble US
Scrabble UK
WWF
Wordle Guess
• adjective
1
Relating to, containing, or belonging to the sulfonamide group of antimicrobial drugs.
Example
"The patient developed a severe allergic rash after taking a sulfa antibiotic for her infection."
• noun
1
A sulfa drug; any of various synthetic organic compounds derived from sulfanilamide that inhibit bacterial growth and are used to treat bacterial infections.
Example
"Before the widespread availability of penicillin, physicians relied heavily on sulfa to treat battlefield wounds."
Synonyms
View all synonyms for sulfaWord Origin & Etymology
Coined in the early 1940s as a clipped form of 'sulfanilamide' or 'sulfonamide', a compound of 'sulfur' and 'amide'.
Usage Trend
Historical frequency of usage in published text.
180019102020
Data source: Google Books Ngram Viewer
Cite this Entry
Wordmom. (2026). Definition of Sulfa. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/sulfa