from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Any of various protozoans, such as the vorticella, having a wide oral opening surrounded by cilia.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A ciliate protozoan of the subclass Peritrichia.
From New Latin Peritrichida, former order name : peri- + Greek thrix, trikh-, hair.(American Heritage® Dictionary of the English Language, Fourth Edition)