12-Letter Words Containing: TROM_

• the use of spectroscopes to analyze spectra

• spectroscope for obtaining a mass spectrum by deflecting ions into a thin slit and measuring the ion current with an electrometer

• Both ventral and medial

• A colourless oily liquid used in organic synthesis, and as a fuel for rockets, racing cars and model aircraft

• The simplest nitroparaffin, CH3NO2

• meter to measure electrostatic voltage differences; draws no current from the source

• A mechanical device that measures the ease of penetration of an object into a semisolid

• A device that measures the penetrating power of electromagnetic radiation (especially X-rays)

• allow to enter; grant entry to

• the act of putting one thing into another

• A laminated, columnar, rock-like structure constituting a large share of all fossils from 3.5 to 0.5 billion years ago, with some still being formed at present, some or all of which result from the deposit of minerals by microorganisms such as cyanobacteria.