sten·tor 
(stĕntôr′)
(stĕntôr′)n.
1. Stentor Greek Mythology A loud-voiced Greek herald in the Iliad.
2. One with a loud or piercing voice.
3. Any of several trumpet-shaped ciliate protozoans of the genus Stentor, living in freshwater habitats and feeding chiefly on smaller microorganisms.
[Greek Stentōr. Sense 3, from New Latin Stentōr, genus name, from Greek Stentōr, Stentor (in reference to their trumpetlike shape).]
stentorStentor coeruleus