The Britannica Dictionary
mobile search
Home
Ask the Editor
Word of the Day
Quizzes
Core Vocabulary
Browse the Dictionary
×
Britannica Homepage
Ask the Editor
Word of the Day
Quizzes
Core Vocabulary
Browse the Dictionary
The Britannica Dictionary
sphincter
1 ENTRIES FOUND:
sphincter
(noun)
sphincter
/
ˈ
sfɪŋktɚ/
noun
plural
sphincters
sphincter
/
ˈ
sfɪŋktɚ/
noun
plural
sphincters
Britannica Dictionary definition of SPHINCTER
[
count
]
medical
:
a ring-shaped muscle that surrounds a body opening and that can tighten to close the opening
ASK THE EDITOR
What are the plural forms of
check-in
,
passerby
, and
spoonful
?
See the answer »
QUIZZES
Vocabulary Quiz
Test your word power
Take the Quiz »
Name That Thing
Take our visual quiz
Test Your Knowledge »
WORD OF THE DAY
expensive
:
costing a lot of money
Learn More »
