An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

One of small covers that can be moved along the dome slit to vary the slit size.

→ dome; → hatch.

1) (of an egg) To open and produce a young animal; emerge from its egg.
2a) The act or process of hatching.
2b) A small opening in a wall that serves as a doorway or window. → dome hatch.

1) M.E. hachen "to produce young from eggs by incubation," probably from an unrecorded O.E *hæccan, of unknown origin, related to M.H.G., Ger. hecken "to mate" (used of birds).
2) M.E. hacche, O.E. hæcc "fence, half-gate;" cf. M.H.G. heck, Du. hek "gate, railing."

1) Lâcidan, from Tabari lâc "open, separated, wide aprat" (lâc hâytan "to split, to crack," lâc bazoən "to split, to tear"), may be from Proto-Ir. *rauj "to break, burst;" cf. Av. (+*fra-) fra.uruxti- "destruction;" Khotanese *rrus- "to burst, break;" Baluchi ruj- "to break open;" Bartangi, Oroshori ruj-/ruxt- "to dig;" Skt. roj- "to break, break open;" Pali luki- "part;" L. lugere "to mourn, grieve;" Armenian lucanem "I break up."
2) Daricé, from dar, → door, + -cé diminutive suffix.