peridinium

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Definitions from WordNet

Noun peridinium has 1 sense

Peridinium, genus Peridinium - type genus of the family Peridiniidae
--₁ is a kind of protoctist genus
--₁ is a member of Peridiniidae, family Peridiniidae

Definitions from the Web

Peridinium

Noun

1. A genus of marine planktonic and freshwater dinoflagellates, characterized by a round to oblong shape and two flagella.

Sample sentence: The peridiniums were visible under the microscope as they swam about in the water.

Noun

2. Any individual organism belonging to the genus Peridinium.

Sample sentence: The peridinium floated near the water's surface, capturing sunlight through photosynthesis.