noun
ultrastructure; fine structure; microstructure
In biology, refers to the detailed structure of cells and tissues visible only under an electron microscope.
電子顕微鏡で細胞の微細構造を観察する。
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.
原子スペクトルの微細構造は、電子のスピン軌道相互作用によって生じる。
The fine structure of atomic spectra arises from spin-orbit interaction of electrons.