微び細さい構こう造ぞう

noun

ultrastructure; fine structure; microstructure

In biology, refers to the detailed structure of cells and tissues visible only under an electron microscope.

• 電でん子し顕けん微び鏡きょうで細さい胞ぼうの微び細さい構こう造ぞうを観かん察さつする。

  Observe the ultrastructure of cells with an electron microscope.

noun

fine structure

In physics, typically refers to the splitting of spectral lines due to relativistic effects and electron spin.

• 原げん子しスペクトルの微び細さい構こう造ぞうは、電でん子しのスピン軌き道どう相そう互ご作さ用ようによって生しょうじる。

  The fine structure of atomic spectra arises from spin-orbit interaction of electrons.