An Etymological Dictionary of Astronomy and Astrophysics
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فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 3 Search : salt
salt
  نمک   
namak (#)

Fr.: sel   

1) A crystalline compound, sodium chloride, NaCl, occurring as a mineral, used for food seasoning and preservation.
2) Chem.: A solid compound formed when the hydrogen of an acid has been replaced by a metal.

O.E. sealt; cf. O.N., O.Fris., Goth. salt, Du. zout, Ger. Salz from PIE *sal- "salt;" cf. Gk. hals (genitive halos) "salt, sea;" L. sal; O.Ir. salann; Welsh halen; O.C.S. sali "salt."

Namak "salt;" Mid.Pers. namak "salt."

salt finger
  انگشت ِ نمک   
angošt-e namak

Fr.: doigts de sel   

Oceanography: One of several alternating columns of rising and descending water resulting from a → mixing process that occurs when warm salty water overlies a colder and relatively fresher layer of water. If the overlying salty water loses enough heat, it sinks down into the colder, fresher water, lengthening into a finger of salty water. Becuse the finger loses heat faster than it loses salt, the salt finger will continue to sink (salty water is denser than fresh water of the same temperature). Hence the salt finger loses more heat and displaces the colder water around it, which rises up and mixes into the warm salty layer above. Salt fingers are an example of → double-diffusive convection and play an important role in oceanic mixing. See also → fingering instability, → fingering convection.

salt; → finger.

saltpeter
  شوره   
šuré (#)

Fr.: salpètre   

A chemical compound, potassium nitrate, KNO3. It is a naturally occurring mineral source of nitrogen, and is used in the manufacture of fireworks, fluxes, gunpowder, etc.

M.E. sal peter, salpetre, from O.Fr. salpetre, from M.L. sal petrae "salt of rock," from L. sal, → salt + petra "rock, stone."

Šuré, related to šur "salty;" Mid.Pers. šôr "salty," šorag "salt land;" cf. Skt. ksurá- "razor, sharp knife;" Gk. ksuron "razor;" PIE base *kseu- "to rub, whet."