単たん細さい胞ぼう生せい物ぶつたんさいぼうせいぶつMeanings1noununicellular organism; single-celled organismBiological term for organisms consisting of a single cell, such as bacteria, protozoa, and some algae.アメーバは単たん細さい胞ぼう生せい物ぶつの一いっ種しゅです。