The term protozoan refers to a group of single-celled organisms that are found in aquatic and moist environments. The crossword solutions for this term include amebic (6 letters), AMOEBA (6 letters), ameba (5 letters), and MONAD (5 letters). Amebic and AMOEBA refer to the same organism, which is a type of protozoan that moves by extending pseudopods. Ameba is another type of protozoan that moves by extending pseudopods, while MONAD is a type of protozoan that does not move.