Ciliated protozoan and Protozoan

Ciliated protozoan noun - A protozoan with a microscopic appendage extending from the surface of the cell.

Protozoan and ciliated protozoan are semantically related. In some cases you can use "Protozoan" instead a noun phrase "Ciliated protozoan".

Protozoan noun - Any of diverse minute acellular or unicellular organisms usually nonphotosynthetic.

Ciliated protozoan and protozoan are semantically related. Sometimes you can replace phrase "Ciliated protozoan" with "Protozoan", this terms are similar.