Help Wordnik hunt for a million missing words by backing our Kickstarter!


from The Century Dictionary and Cyclopedia

  • In petrography, a term used in the quantitative classification of igneous rocks (see rock) to describe a subdivision of igneous rock magma having equal or nearly equal proportions of chlorin, Cl, and sulphur trioxid, SO3. The proportions may vary within the limits, .


Sorry, no etymologies found.


Sorry, no example sentences found.


Log in or sign up to get involved in the conversation. It's quick and easy.