ultramicrotomeWiktionary 原文构词拆分ultra-前缀Greater than normal quantity or importance, as in ultrasecret. · Beyond, on the far side of, as in ultraviolet.+microtome词根/词干词源说明From ultra- + microtome.释义（英文）名词 NounA microtome that cuts extremely thin slices of tissue, especially for use in electron microscopy.动词 VerbTo cut into sections by means of an ultramicrotome词族派生词（1）cryoultramicrotome