Cantharus may refer to:
*
Cantharus (Christianity)
A cantharus, also known as a phiala, is a fountain used by Christians for ablution before entering a church. These ablutions involve the washing of the hands, face, and feet. The cantharus is traditionally located in the exonarthex of the church. ...
, a fountain used by Christians for making ablutions
*
Kantharos (also spelled cantharus), a Greek drinking cup
*Kantharos (also spelled Cantharus), an ancient
Athenian comic poet
*Kantharos (also spelled Cantharus), a harbour in ancient Athens
*Sea snails in the family Pisaniidae, including:
**''
Cantharus'', a genus of sea snails
**
Common cantharus (''Gemophos auritulus'')
**
Measle-mouth cantharus (''Gemophos sanguinolentus'')
**
Ringed cantharus (''Gemophos ringens'')
**
Tinted or painted cantharus (''Gemophos tinctus'')
**
Ribbed cantharus (''Hesperisternia multangula'')
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