半はん透とう膜まく

noun

semipermeable membrane

Technical term in biology and chemistry for a membrane that allows certain molecules to pass through while blocking others.

• 細さい胞ぼう膜まくは半はん透とう膜まくの一いっ種しゅである。

  The cell membrane is a type of semipermeable membrane.

• 半はん透とう膜まくを通とおして水すい分ぶん子しだけが移い動どうする現げん象しょうを浸しん透とうという。

  The phenomenon in which only water molecules move through a semipermeable membrane is called osmosis.