acidulous C2+ Topic:Register & Style US /əˈsɪdjʊləs/ See IPA manual Freq #493439 Meanings 1 adj Slightly sour; subacid; sourish. The hard, acidulous, metallic tincture of the spring. 2 adj Sharp; caustic. He talked with acidulous tolerance of the exalted personages who had sent Ashenden to X. 3 adj Containing carbonic acid. Acidulous mineral waters. Thesaurus Word family Derived forms acidulouslyacidulousnessnonaciduloussubacidulous Etymology Learned borrowing from Latin acidulus (“sourish, acidulous”), diminutive of acidus (“sour, acid”). See acid. By surface analysis, acid + -ule + -ous. Topics Register & Style External links Cambridge Dictionary Wiktionary Google Images # acidulous **Type:** Word **Level:** C2+ **Part of speech:** adj **IPA (US):** /əˈsɪdjʊləs/ **Frequency rank:** 493439 ## Meanings 1. Slightly sour; subacid; sourish. 2. Sharp; caustic. 3. Containing carbonic acid. ## Examples - The hard, acidulous, metallic tincture of the spring. - He talked with acidulous tolerance of the exalted personages who had sent Ashenden to X. - Acidulous mineral waters. ## Derived Forms - acidulously - acidulousness - nonacidulous - subacidulous ## Etymology Learned borrowing from Latin acidulus (“sourish, acidulous”), diminutive of acidus (“sour, acid”). See acid. By surface analysis, acid + -ule + -ous. ## Topics - Register & Style markdown