ABBEY, ANIMAL, AQUATIC, CAUDATUM, CILIATE, CILIOPHORA, DARK, DARK-FIELD, DARKFIELD, FIELD, LIGHT, LIVING, LM, MICHAEL, MICROBE, MICROBIOLOGY, MICROGRAPH, MICROORGANISM, MICROSCOPIC, MICROSCOPY, ONE-CELLED, ORGANISM, PARAMECIA, PARAMECIUM, PROTIST, PROTISTA, PROTOZOA, PROTOZOAN, SINGLE-CELLED, UNICELLULAR,