cryptomelane

About 0.01 uses per million words.

Meaning

1. noun A monoclinic-prismatic mineral containing manganese, oxygen, and potassium.

Similar words

manganomelane manaksite strontiomelane chameleon mineral melanothallite manganonaujakasite manganotychite melaconite chlormanganokalite manganochromite

Often followed by

and is are