noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   An instrument used to determine the chemical composition at a point on a solid surface, such as that of a mineral. It analyzes the X-rays emitted when a beam of electrons are focused on the sample.

Etymology

From micro- + probe.

Related phrases

x ray

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.