noun
lower life form; lower organisms
Refers to organisms considered less complex or less evolved, often in biological or figurative contexts.
下等生物から高等生物への進化を学ぶ。
We learn about evolution from lower organisms to higher organisms.
Antonym; refers to higher or more complex organisms.
Compound of 下等 (かとう, 'lower grade') + 生物 (せいぶつ, 'living thing').