SINCE 1828
physa
noun
phy·sa
| \ ˈfīsə\
Definition of physa
1a
capitalized
: a widely distributed genus (the type of the family Physidae) of freshwater air-breathing snails, having a sinistral, ovate, usually rather short-spired shell and slender nonretractile tentacles with the eyes at their bases
b
plural -s
: any snail of the genus Physa
2
plural physae\ -ˌsē , -ˌsī\
also physas
: the lower often retractile part of the body of some anthozoans
Keep scrolling for more
Comments on physa
What made you want to look up physa? Please tell us where you read or heard it (including the quote, if possible).
Test Your Vocabulary
The Exceptions Quiz III
-
- Which of these words does not mean "nonsense"?
Can you spell these 10 commonly misspelled words?
TAKE THE QUIZ
Test Your Knowledge - and learn some interesting things along the way.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Words at Play
Ask the Editors
Word Games
Share physa
Resources for physa