altazimuth
noun
alt·az·i·muth (ˌ)al-ˈtaz-məth 
-ˈta-zə-
often attributive
: a telescope mounted so that it can swing horizontally and vertically
also : any of several other similarly mounted instruments
Word History
Etymology
International Scientific Vocabulary altitude + azimuth
First Known Use
1851, in the meaning defined above