VORTICELLA
vorticella
(noun) any of various protozoa having a transparent goblet-shaped body with a retractile stalk
Source: WordNet® 3.1
Etymology
From the genus name.
Noun
vorticella (plural vorticellas or vorticellae)
Any protozoan of the genus Vorticella.
Source: Wiktionary
Vor`ti*cel"la, n.; pl. E. Vorticellas (, L. Vorticellæ (. Etym: [NL.,
dim. fr. L. vortex. See Vortex.] (Zoöl.)
Definition: Any one of numerous species of ciliated Infusoria belonging to
Vorticella and many other genera of the family Vorticellidæ. They
have a more or less bell-shaped body with a circle of vibrating cilia
around the oral disk. Most of the species have slender, contractile
stems, either simple or branched.
Source: Webster’s Unabridged Dictionary 1913 Edition