ultramicroscope

1. Too small to be seen without an ultramicroscope.
   极小的以至没有超显微镜就看不见的。
2. The microscope and ultramicroscope structure of liver in the mouse treated with mercuric chloride are studied.
   采用***染毒的方法，对昆明种小白鼠的肝脏进行了显微及亚显微结构研究。

noun

1. light microscope that uses scattered light to show particles too small to see with ordinary microscopes

   Synonym:    dark-field microscope