chemical

/'kemikəl/

Thân thiện

A scientist carefully measures a chemical in a laboratory.

Definition

1. Adjective:

   • Relating to chemistry: Pertaining to the science that deals with the composition, structure, properties, and reactions of substances.
   • Involving or produced by chemicals: Made from or using substances that are produced by or used in reactions involving changes at the atomic or molecular level.

2. Noun:

   • A substance with a distinct molecular composition: Any basic substance produced by or used in a chemical reaction involving changes in atoms or molecules.

Usage Examples

• Adjective:
  • The laboratory is equipped for chemical analysis. (The lab has tools for analysis related to chemistry.)
  • They are studying the chemical properties of the new compound. (They are investigating the properties defined by its molecular structure.)
• Noun:
  • This cleaner contains harsh chemicals. (This cleaning product contains strong synthetic substances.)
  • The reaction produced a new chemical. (The reaction resulted in a new substance with a different molecular composition.)

Advanced Usage

• "Chemical engineering": The branch of engineering concerned with the design and operation of industrial chemical plants.
  • She pursued a degree in chemical engineering.
• "Chemical bond": A strong attraction between atoms or ions in a molecule or crystal.
  • The chemical bond between oxygen and hydrogen is strong.

Variants and Related Words

• Chemically (adverb): In a way that relates to chemistry or chemicals.
  • The fabric was chemically treated to resist stains.
• Biochemical (adjective): Relating to the chemical processes and substances occurring within living organisms.
  • He studies biochemical pathways.

Synonyms

• Adjective: Chemic, alchemical.
• Noun: Substance, compound, reagent.

Related Phrases

• Chemical reaction: A process where substances are transformed into different substances.
  • The chemical reaction released a lot of heat.
• Chemical imbalance: A disruption in the normal levels of chemicals in the body, often referring to the brain.
  • The doctor discussed a possible chemical imbalance.

Idioms

(Note: There are few common idioms using "chemical" as the core word. It is primarily used in technical and literal contexts.) - "Chemical dependency": A state of physiological or psychological need for a psychoactive drug. - The clinic specializes in treating chemical dependency.

Học thuật

Adjective

1. of or made from or using substances produced by or used in reactions involving atomic or molecular changes
   • chemical fertilizer
2. relating to or used in chemistry
   • chemical engineer
   • chemical balance

Noun

1. material produced by or used in a reaction involving changes in atoms or molecules

Từ đồng nghĩa

• chemic
• chemical substance