One of the mysteries of the English language finally explained.
Of or containing ammonia.
- ‘During the diaper-wearing years, this is usually ammoniacal dermatitis, commonly known as diaper rash.’
- ‘Cupron is highly selective for copper ion in ammoniacal solution and for molybdenum in acid.’
- ‘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.’
- ‘Diabetic ketoacidosis can cause urine to have a fruity or sweet odor, and alkaline fermentation can cause an ammoniacal odor after prolonged bladder retention.’
- ‘Current research has shown an increase in soil acidification through anthropogenic effects including acid precipitation and nitrification of ammoniacal fertilizers.’
- ‘This stuff is strongly ammoniacal and really needs to be used with care and ventilation.’
- ‘Ammonium chloride is an effective restrainer, but gives off a strong ammoniacal smell and may shift print color toward the red.’
- ‘The ammoniacal acetone supernatant containing extracted pigments was discarded, and the lipoprotein pellet was suspended in 2 mL of homogenization buffer.’
- ‘Then come the first faint traces of the animal - warm, only slightly rank, ammoniacal, like a wet dog drying in the sun.’
- ‘Some species live entirely in this restricted habitat, but most become ammoniacal late in ontogeny, as they approach semelparous reproduction.’
- ‘Observations on the neutrally buoyant ammoniacal cephalopods of the mesopelagic zone are rare and based on submarine or ROV observations that are typically brief.’
- ‘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).’
- ‘We have recorded reduced levels of chloride, nitrate-nitrite nitrogen, ammoniacal nitrogen, chemical oxygen and dissolved and suspended solids.’
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.
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