nephelinite
noun
neph·e·lin·ite ˈne-fə-lə-ˌnīt 
: a silica-deficient igneous rock having nepheline as the predominant mineral
nephelinitic
ˌne-fə-lə-ˈni-tik
adjective 
Word History
Etymology
International Scientific Vocabulary
First Known Use
circa 1863, in the meaning defined above
- astronomical latitude
- astronomical telescope
- astronomical time
- astronomical triangle
- astronomical twilight
- astronomical unit
- astronomically
- astronomies
- astronomise
- astronomised
- astronomises
- astronomising
- astronomize
- astronomized
- astronomizes
- astronomizing
- astronomy
- Astropecten
- astrophels
- astrophic
- astrophil
- astrophile
- astrophoto
- astrophotograph
- astrophotographer