Definition

1. Adjective:

   • Pertaining to, containing, or similar to ammonia: Describes something that has the properties, characteristics, or composition of ammonia (NH₃), a colorless gas with a pungent smell.

2. Noun:

   • The aromatic gum of the ammoniac plant: A resinous gum obtained from certain plants, especially Dorema ammoniacum, known for its strong odor and historical use in medicine and perfumery.

Examples of Usage

• Adjective:

  • The laboratory had a strong ammoniac odor after the chemical spill.
  • They used an ammoniac solution for the cleaning process.

• Noun:

  • Traditional medicine sometimes employed ammoniac as an expectorant.
  • The ancient recipe called for a small amount of gum ammoniac.

Advanced Usage

• Scientific/Technical Context: The term is often used in chemistry and botany. The adjectival form is more common in modern technical writing than the noun form referring to the plant resin.
  • The test confirmed the presence of ammoniac compounds in the sample.

Variants and Related Words

• Ammonia (n): The specific chemical compound (NH₃) itself.
  • Ammonia is commonly used in fertilizers and cleaners.
• Ammoniacal (adj): A synonym for the adjective 'ammoniac', meaning of or pertaining to ammonia.
  • The ammoniacal smell was overwhelming.

Synonyms

• Adjective: Ammoniacal
• Noun: Gum ammoniac, Ammoniacum

Notes on Meaning

• The primary modern use of ammoniac is as an adjective. The noun form referring to the plant resin is largely historical or specialized.
• Do not confuse ammoniac (the adjective/gum) with ammonia (the specific chemical substance). They are related but distinct terms.

Adjective

1. pertaining to or containing or similar to ammonia

Noun

1. the aromatic gum of the ammoniac plant