Cyclas may refer to:
*
Cyclas (garment), a garment worn in Europe during the Middle Age
*
''Cyclas'' (beetle), a genus of true weevils
* ''Cyclas'', a synonym for ''
Crudia'', a genus of plants
* ''Cyclas'', a synonym for ''
Sphaerium
''Sphaerium'' is a genus of very small freshwater clams, aquatic bivalve molluscs in the family Sphaeriidae, known as the fingernail clams. The small clams in this genus are unusual in that many of them, such as ''Sphaerium corneum'', can climb ...
'', a genus of freshwater clams
{{disambiguation, genus