acidulous

Meanings

1. 1
   adj

   Slightly sour; subacid; sourish.

   The hard, acidulous, metallic tincture of the spring.

2. 2
   adj

   Sharp; caustic.

   He talked with acidulous tolerance of the exalted personages who had sent Ashenden to X.

3. 3
   adj

   Containing carbonic acid.

   Acidulous mineral waters.

Learned borrowing from Latin acidulus (“sourish, acidulous”), diminutive of acidus (“sour, acid”). See acid. By surface analysis, acid + -ule + -ous.

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