noun, noun which may take the genitive case particle 'no'
semipermeability
Technical term used in biology, chemistry, and materials science to describe a membrane or barrier that allows certain molecules or ions to pass through while blocking others.
細胞膜は半透性を持っている。
The cell membrane has semipermeability.
半透性の膜を通して、水だけが移動
Only water moves through the semipermeable membrane.
選択透過性 (selective permeability) is a broader term; 半透性 often implies a specific type of selective permeability based on size or solubility.
Compound of 半 (half, semi-) + 透 (permeate, penetrate) + 性 (property, nature). A modern technical term formed from kanji components.