arcella

WordNet-Online
Free dictionary and thesaurus of English. Definitions, synonyms, antonyms and more...
Hint: double-click any word to get it searched!

Definitions from WordNet

Noun arcella has 1 sense

arcella - an amoeba-like protozoan with a chitinous shell resembling an umbrella
--₁ is a kind of protozoan, protozoon
--₁ is a member of genus Arcella

Definitions from the Web

Arcella

Noun

Arcella is a microorganism belonging to the phylum Rhizaria, specifically the testate amoebae class. It is characterized by its shell-like structure, known as a test, which is composed of organic materials and minute sand grains.

Sense 1:

Definition: A microscopic protozoan found in freshwater habitats.

Example sentence: The arcella was observed under the microscope, swimming gracefully in the drop of pond water.

Sense 2:

Definition: The shell-like structure or test of an arcella.

Example sentence: The arcella's test had intricate patterns and provided protection for the organism.