Saline

google

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late 15th century: from Latin sal ‘salt’ + -ine1.

wiktionary

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From Middle French salin, from Latin sal(“salt”).

etymonline

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saline (adj.)

"made of salt," c. 1500, probably from a Latin word related to salinum "salt cellar" and salinae "salt pits," from sal (genitive salis) "salt" (from PIE root *sal- "salt"). Also in Middle English as a noun meaning "salt pit" (13c.). Saline solution attested from 1833.