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

The fraction of the sky covered by clouds. It is expressed in tenths, so that 0.0 indicates a clear sky and 1.0 (or 10/10) indicates a completely covered sky.

→ cloud; → cover.

1) To spread over an area or surface.
2) Something that covers.

From M.E., from O.Fr. covrir, from L. cooperire "to cover over, overwhelm, bury," from the intensive prefix → com- + operire "to close, cover."

Pušidan "to cover; to put on," → envelope; pušeš, verbal noun of pušidan.

1) General: The extent to which something is covered.
2) Astro.: The total area of the sky observed in a particular → sky survey. See also → fractional sky coverage.
3) The area within which a radio signal sent by a transmitter is received reliably .
4) In film making, the shooting of a scene from various views and using various exposures.

From → cover + -age a suffix forming abstract nouns.

→ cover.

To find (something previously unseen or unknown) after study or search.

M.E. discoverir, descovrir, from O.Fr. descovrir "uncover, unveil, reveal," from L.L. discooperire, from L. → dis- "opposite of" + cooperire "to cover up," → cover.

Padvâridan "to uncover," infinitive from padvâr, from prefix pad- "against, contrary, opposite to," variants pat-, pâd-, → anti-, + vâr- "to cover;" cf. Av. vār- "to cover;" Mid.Pers. (with prefix *uz-) uzvâr- "to interprete, uncover, grasp," Pers. hozvâr(eš) "interpretation;" Khotanese (+ *ui-) gvir- "to be revealed;" Choresmian (+ *apa-) bw'rg- "to uncover;" Pers. barg "cover, clothes;" šalvâr "trousers" (Cheung, 2007).

The act or an instance of discovering. Something discovered.

Verbal noun of → discover.

The portion of the 4π → steradians of the sky that a radiotelescope can observe from a given location on Earth over a 24-hour time interval.

→ fractional; → sky; → coverage.

The → range of → wavelengths or frequencies (→ frequency) at which a → detector is sensitive. Same as → bandwidth.

→ spectral; → coverage.