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isohaline
isohaline n. and adj. 
/ˌaɪsəˈheɪˌlaɪn/ [Greek ἅλινος of salt] Oceanography (a) n. a line (imaginary or on a chart), or an imaginary surface, connecting points which have the same salinity; (b) adj. connecting such points; also, of a constant salinity throughout.
Brit. /ˌʌɪsə(ʊ)ˈheɪlʌɪn/
, /ˌʌɪsə(ʊ)ˈheɪlʌɪn/U.S. /ˌaɪsoʊˈheɪˌlaɪn/
, /ˌaɪsoʊˈheɪˌlaɪn//ˌaɪsəˈheɪˌlaɪn/ΘΚΠ
the world > the earth > earth sciences > geography > map-making > map > [noun] > line on map > water features
cotidal line1833
isobath1889
isochlor1890
isohaline1902
isopycnal1927
the world > the earth > earth sciences > geography > map-making > map > [adjective] > line on map > water features
isopycnic1890
isohaline1902
1902 Encycl. Brit. XXXI. 404/2 South of the Tropic of Capricorn the isohalines run nearly east and west.
1964 Oceanogr. & Marine Biol. 2 71 In winter the fiord water becomes isothermal and isohaline with average temperature and salinity of −1·76°C and 32·75‰.
1964 Oceanogr. & Marine Biol. 2 375 (caption) The increase in salinity in recent decades has altered..the course of the isohalines given in the chart.
1968 G. Neumann Ocean Currents iv. 129 The slope of isobaric surfaces..is small when compared to the slope of isothermal, isohaline (surfaces of equal salinity) and iso-pycnal surfaces.
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