na-adjective
pseudo; quasi; artificial; simulated
Describes something that is not genuine but made to resemble the real thing; often used in technical or formal contexts.
この実験では擬似的な環境を作り出した。
In this experiment, we created a simulated environment.
それは擬似的な解決策に過ぎない。
That is merely a pseudo solution.
疑似 is a noun or prefix meaning 'pseudo' or 'sham', while 擬似的 is an adjectival noun form that can modify nouns with な or function adverbially with に.
人工的 means 'artificial' in the sense of man-made, often contrasting with natural; 擬似的 emphasizes imitation or simulation rather than physical creation.
Formed from 擬似 (giji, 'pseudo') + 的 (teki, '-like'). The kanji 擬 means 'imitate' or 'mimic'.