How to Say "saline solution" in Spanish
The Spanish word for “saline solution” is “suero” — B1 level. This is a very common word in everyday Spanish.
English → SpanishB1
nounB1
medical salt water

Examples
El enfermero le puso un suero para la deshidratación.
The nurse gave him an IV for dehydration.
Tienes que tomar suero oral para recuperarte.
You need to drink oral rehydration salts to recover.
Masculine Noun
Since it ends in -o, it uses 'el' or 'un'. It follows the standard pattern for most Spanish nouns.
Related Translations
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