A vault, having a circular plan and usually in the form of a portion of a sphere,
that shelters an optical telescope.
From Fr. dôme, from Gk. doma "house, housetop," related to domos "house" (PIE *domo-/*domu- "house, household;" cf. Av. dam-, dəmāna- "house," Skt. dám- "house," Gk. doma "house," L. domus "house," Rus. dom "house," Lith. dimstis "enclosed court, property," O.E. timber "building, structure").
Mid.Pers. gumbat, gônbat.
Fr.: volet de coupole
One of small covers that can be moved along the dome slit to vary the slit size.
Fr.: fermeture de fente
A pair of rolling lids that are used to open or close the dome slit.
Bastâr, from bast, past tense stem of bastan + -âr. Bastan, from Mid.Pers. bastan/vastan "to bind, shut," Av./O.Pers. band- "to bind, fetter," banda- "band, tie," Skt. bandh- "to bind, tie, fasten," PIE *bhendh- "to bind," cf. Ger. binden, E. bind, → band. The suffix -âr creates creates agent nouns; → dome.
Fr.: fente de coupole
An opening along the spherical body of a dome through which an optical telescope can observe.
gonbad-e durbin (#), ~ teleskop (#)
Fr.: coupole de télescope
A covering, usually hemispherical, that is rotatable about a central axis. There is a slit opening along one side wide enough to allow a telescope to be directed at any vertical angle up to 90°.