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Definitions

prophylactic

[proh-fuh-lak-tik, prof-uh-] / ˌproʊ fəˈlæk tɪk, ˌprɒf ə- /
ADJECTIVE
protective
Synonyms


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

While experts try to lock in a diagnosis, the center reported she’s receiving several prophylactic treatments and they are “cautiously hopeful.”

From Los Angeles Times Jul. 28, 2026

Pet owners across the country have been advised they should treat their cats and dogs as a preventative measure every month, known as prophylactic use - although many veterinary organisations have now updated their advice.

From BBC Jun. 10, 2026

Schiffman, 29, knew her mom had a prophylactic double mastectomy in 2015 after discovering she had the BRCA1 gene mutation.

From The Wall Street Journal Jun. 7, 2026

Volunteers were divided into two groups: prophylactic arm and therapeutic arm.

From Science Daily Feb. 19, 2026

Since the discovery by Jenner of the prophylactic power of vaccination as regards small-pox, the attention of the profession has been frequently directed to the prevention of scarlet fever.

From A System of Practical Medicine by American Authors, Vol. I Volume 1: Pathology and General Diseases by Various




Vocabulary lists containing prophylactic


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