perthite
/ˈpəːθʌɪt/Geology
noun
A variety of alkali feldspar usually consisting of roughly parallel intergrowths of an exsolved sodium-rich phase (as albite) and a potassium-rich phase (as microcline).
Origin
Mid 19th century; earliest use found in Thomas Thomson. From Perth, the name of the town in Ontario, Canada, where it was first found + -ite.
- legalistic
- legalistically
- legality
- legalization
- legalize
- legally
- legal pad
- legal person
- legal practice
- legal practitioner
- legal proceedings
- legal profession
- legal separation
- legal-size
- legal tender
- legate
- legate a latere
- legatee
- legateship
- legatine
- legation
- legato
- legator
- leg before
- leg before wicket