You searched for: “aphanite
1. An igneous rock with mineral components that are too fine to be seen with the naked eye.
2. A very compact, dense, homogeneous dark-colored rock, consisting of grains which are too fine to be seen without some form of magnification.
This entry is located in the following units: -ite (page 1) phant-, phanta-, phas-; -phasic, -phant (page 1)