An Etymological Dictionary of Astronomy and Astrophysics

1. A pair of rolling lids that are used to open or close the dome slit. Same as → dome shutter.
   
2. A mechanical device that controls the time during which light is admitted in an optical system.

Etymology (EN): Shutter, from shut (v.), from O.E. scyttan from W.Gmc. *skutjanan + → -er.

Etymology (PE): 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 agent nouns (as in xaridâr, virâstâr, foruxtâr, nemudâr, etc.).