Definition of ammoniacal in English:


Pronunciation /ˌaməˈnīək(ə)l/ /ˌæməˈnaɪək(ə)l/


  • Of or containing ammonia.

    ‘ammoniacal liquor from the coke ovens’
    • ‘Cupron is highly selective for copper ion in ammoniacal solution and for molybdenum in acid.’
    • ‘The ammoniacal acetone supernatant containing extracted pigments was discarded, and the lipoprotein pellet was suspended in 2 mL of homogenization buffer.’
    • ‘Current research has shown an increase in soil acidification through anthropogenic effects including acid precipitation and nitrification of ammoniacal fertilizers.’
    • ‘We have recorded reduced levels of chloride, nitrate-nitrite nitrogen, ammoniacal nitrogen, chemical oxygen and dissolved and suspended solids.’
    • ‘If the odor of the urine is strong, record whether the urine smells urinoid, fruity (like acetone or fingernail polish remover), putrid (fecal smelling) or ammoniacal (like ammonia).’
    • ‘Diabetic ketoacidosis can cause urine to have a fruity or sweet odor, and alkaline fermentation can cause an ammoniacal odor after prolonged bladder retention.’
    • ‘It contains only ammoniacal nitrogen, which is protected from leaching immediately after application since it is held by cation exchange sites on soil clays and organic matter.’
    • ‘Observations on the neutrally buoyant ammoniacal cephalopods of the mesopelagic zone are rare and based on submarine or ROV observations that are typically brief.’
    • ‘Some species live entirely in this restricted habitat, but most become ammoniacal late in ontogeny, as they approach semelparous reproduction.’
    • ‘During the diaper-wearing years, this is usually ammoniacal dermatitis, commonly known as diaper rash.’
    • ‘Ammonium chloride is an effective restrainer, but gives off a strong ammoniacal smell and may shift print color toward the red.’
    • ‘Then come the first faint traces of the animal - warm, only slightly rank, ammoniacal, like a wet dog drying in the sun.’
    • ‘This stuff is strongly ammoniacal and really needs to be used with care and ventilation.’


Mid 18th century from Middle English ammoniac, via Old French from Latin ammoniacus. This represented the Greek word ammōniakos ‘of Ammon’, used as a name for the salt and gum obtained near the temple of Jupiter Ammon at Siwa in Egypt. Compare with sal ammoniac.