n 1  cap  :  a genus of ciliate protozoans that have an elongate body rounded at the anterior end and an oblique funnel-shaped buccal groove bearing the mouth at the extremity  2  pl  -cia  also  -ciums  :  any ciliate protozoan of the genus Paramecium .
 
   
 
Similar sounding terms:  Par·a·moe·cium  peri·my·si·um 
 
Published under license with Merriam-Webster, Incorporated.  © 1997-2004.